Experimental Design of Interoperable Smart Lighting for Elderly Care
Circadian Rhythm; Elderly Care; Smart Home; Smart Lighting
Smart Home attains an active role in elderly care. Vision impairments caused by aging makes elders more dependent and affects the circadian rhythm or body clock. Some vision impairments can be improved by providing additional lighting. Smart lighting is the leading solution in providing adequate quality of lighting which helps elders to perform their daily activities independently. Various smart lighting solutions for elderly care are proposed in past and failed to consider about the energy loss due to over lighting. Additionally, the solutions are more independent in nature and not integrable to existing smart home solutions. To provide a solution to these ongoing challenges, an experimental design has been proposed to manage the adequate quality lighting for elderly people by controlling the illuminance and color temperature of the light with a feedback mechanism. Also, this experiment has integrated into a popular smart home platform. The proposed design keeps monitoring the ambient lighting and maintains the room's illumination as required for elderly individuals. The functional behaviors of the experimental design are evaluated using a testbed. The result shows that the proposed design reduces the energy usage more than 50% along with providing adequate lighting for elderly individuals. In addition, this experimental design promises that the proposed method can be easily integrated into any existing smart home solutions with its native scripting framework. 2024 IEEE.
Proceedings of the 2nd IEEE International Conference on Networking and Communications 2024, ICNWC 2024
Institute of Electrical and Electronics Engineers Inc.
Sadasivam B., CHRIST (Deemed to be University), Department of Computer Science, Bangalore, India; Rajamohan K., CHRIST (Deemed to be University), Department of Computer Science, Bangalore, India
Experimental Evaluation of Deep Learning-Assisted Brain Tumor Identification with Advanced Classification Methodology
Neelaveni P.; Warrier G.S.; Tamilarasi K.; Gopila M.; Thandaiah Prabu R.
Deep Learning in Biomedical Signal and Medical Imaging, pp. 189-206.
Neelaveni P., Rajalakshmi Engineering College, Tamil Nadu, Chennai, India; Warrier G.S., Christ (Deemed to be University), Karnataka, Bangalore, India; Tamilarasi K., Jeppiaar Institute of Technology, Tamil Nadu, Chennai, India; Gopila M., Sona college of Technology, Tamil Nadu, Salem, India; Thandaiah Prabu R., Saveetha Institute of Medical and Technical Sciences, Tamil Nadu, Chennai, India
Experimental evaluation of image segmentation for heart images
Cardiac mr images; Cardiac photo; Dual inverse thresholding; Fcm; Fuzzy c-means; Gaussian function; Morphological functions; Otsu thresholding; Segmentation
The cardiac death is the principal reason of the death in the world.The research work focuses on finding an efficient image segmentation technique for the computer aided detection and also to decrease the noise in the image.The segmentation is implemented with the help of fuzzy C-means clustering along with dual inverse thresholding function and Otsu thresholding.Experimental proof is evaluated with the help of morphological functions and with Gaussian function.The result of the work provides an accurate segmentation for myocardial ischemia in the human heart photo image as well as magnetic resonance imaging. Copyright 2021 Inderscience Enterprises Ltd.
International Journal of Computer Aided Engineering and Technology, Vol-15, No. 45718, pp. 269-280.
https://doi.org/10.1504/ijcaet.2021.117137 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113300555&doi=10.1504%2fijcaet.2021.117137&partnerID=40&md5=f866b08141acfaddfe615621685da9ce
Merjulah R., CHRIST (Deemed to Be University), Hosur Road, Bangalore, 560029, India; Chandra J., CHRIST (Deemed to Be University), Hosur Road, Bangalore, 560029, India
Experimental instigating a counter cultural film platform in Bangalore /
Moving Image Review & Art Journal (MIRAJ), Vol.7, Issue 2, pp.189-297, ISSN No: 2045-6298.
https://intellectdiscover.com/content/journals/10.1386/miraj.7.2.286_7#abstract_content
Experimental investigation and influence of filling ratio on heat transfer performance of a pulsating heat pipe
CFD; Ethalyne glycol; Filling ratio; Heat input; Pulsating heat pipe
Experimental investigation of the two-phase system of a pulsating heat pipe taken into account useful heat transfer In the field of thermal management, many new prospective concepts and techniques have been developed, one of which is the pulsating heat pipe, a classic heat transfer technique. The PHP is constructed from 8 turns of copper tubes with inner diameters of 2 mm, wall widths of 1 mm, and a total length of 5324 mm. The CLPHP uses ethylene glycol as the functioning liquid at different fill proportions of 45 %, 55 %, 65 %, 75 %, and 85 % of its amount. The evaporator section is heated electrically by a plate heater ranging from 120 W to 600 W, and the condenser section is cooled by a continuous flow of cooling water. The results thermal resistance decreases gradually with an increase in heat transfer rate. It is apparent that a lower rate of thermal resistance is by a fill ratio of 55 %. The evaporator temperature is 181.57 C and the condenser temperature is 41.06 C for ethylene glycol measured for calculating heat transfer performance at 600 W, thermal resistance is 0.136 C/W, heat transfer coefficient is 526.45 W/m2-C, and enhanced heat transfer is thus good, exhibiting good improvement at a full percentage of 55 % and when compared with CFD results. 2023 Elsevier Ltd
Thermal Science and Engineering Progress, Vol-38
https://doi.org/10.1016/j.tsep.2023.101649 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85145964803&doi=10.1016%2fj.tsep.2023.101649&partnerID=40&md5=a6b393a21a1064e343a9182716c0232d
Rudresha S., Department of Mechanical Engineering, JSS Academy of Technical Education, Noida, India, Department of Mechanical Engineering, Bangalore Institute of Technology, Bengaluru, India; Babu E.R., Department of Mechanical Engineering, Bangalore Institute of Technology, Bengaluru, India; Thejaraju R., Department of Mechanical and Automobile Engineering, CHRIST (Deemed to be University), Bengaluru, India
Experimental Investigation and Numerical Simulation of Air Circulation in a Non-AC Bus Coach System
Air Circulation; CFD Analysis; Non-AC Bus; Wind Tunnel Test
Air circulation plays a vital role in the comfort of passengers in a bus, being a non-AC bus without any aid from the air conditioning system. The circulation of air is utterly dependent on the design of the bus and the natural flow of air. However, optimize the flow of air inside the bus, a study on the design of the bus is needed. In this regard, experimental work was carried out to achieve uniform airflow by redesigning the coach into an aerodynamic shape. The openings are provided at the leading edge of the bus to evaluate the best possibility for air to circulate in the bus. Three openings were provided at the leading edge of the bus, the first and second openings were mere openings, and the third opening was fitted with a roof vent providing three different geometric patterns to airflow. The initial boundary conditions were developed by considering that all windows and doors of the bus are closed. The scaling ratio of 1:20 was considered for modeling the bus. The experiments were conducted in the wind tunnel test rig. It was observed from the experimentation that the velocity of the air was considered to be the most influential parameter for the optimal air circulation. The velocities of 21.96 m/s and 22.68 m/s were obtained inside bus. The obtained experimental velocities were validated with results obtained by the Computational Fluid Dynamics (CFD). It was observed that a deviation of 5% for the given velocity of 20 m/s. 2022 Materials and Energy Research Center. All rights reserved.
Niranjana S.J.; Kubsad S.S.; Manjunatha S.; Nagaraj Y.; Bhavi I.; Angadi B.M.; Chamkha A.J.; Vanarotti M.B.
International Journal of Engineering, Transactions B: Applications, Vol-35, No. 3, pp. 572-579.
https://doi.org/10.5829/ije.2022.35.03c.10 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125054996&doi=10.5829%2fije.2022.35.03c.10&partnerID=40&md5=cffdf8114cb38d09bdcf88b59ad25489
Niranjana S.J., Department of Mechanical Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560076, India; Kubsad S.S., Department of Mechanical Engineering, Atria Institute of Technology, Karnataka, Bengaluru, 560024, India; Manjunatha S., Department of Mathematics, School of Engineering and Technology, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560076, India; Nagaraj Y., Department of Mechanical Engineering, SJM Institute Technology, Karnataka, Chitradurga, 577502, India; Bhavi I., BLDEAs V.P. Dr. P.G. Halakatti College of Engineering and Technology, Karnataka, Vijayapur, 586103, India; Angadi B.M., BLDEAs V.P. Dr. P.G. Halakatti College of Engineering and Technology, Karnataka, Vijayapur, 586103, India; Chamkha A.J., Faculty of Engineering, Kuwait College of Science and Technology, 7th Ring Road, Doha District, 35004, Kuwait; Vanarotti M.B., Sanjeevan Engineering & Technology Institute, Sanjeevan Knowledge City, Panhala, Maharastra, Kolhapur, India
Experimental Investigation and Predictive Modelling of Tribological Behaviour in Fly Ash Reinforced Polymer Composites Fabricated via Stereolithography
Fly ash; Predictive modelling; Stereolithography; Sustainable materials; Wear behaviour
Tribological evaluation of fly ash-reinforced UV-curable resin composites produced through stereolithography additive manufacturing formed the central focus of this study. Controlled fly ash additions extending up to 2% by weight were examined, and all tests ran under dry sliding conditions. Neat resin was designated as the experimental reference throughout. Even with the modest addition of 0.5% fly ash, wear came down by roughly 9.8%, which was small but directionally significant. Moving to 1% fly ash pushed wear reduction to 16.4%. At 1.5%, the reduction advanced further to 21.3% with all evaluations performed under identical testing conditions. The 2% fly ash specimen produced the highest wear reduction of 25.8% among all compositions examined. Frictional behavior followed a comparable declining trend across filler levels. At 0.5% fly ash COF fell 7.6% below the neat resin value, and at 1% that reduction grew to 12.9%. The 1.5% addition brought friction reduction to 17.4%. Total COF reduction at 2% fly ash reached 20.3%, which confirmed a steady and consistent frictional improvement with progressive filler incorporation. Linear regression and artificial neural networks and XGBoost-based gradient boosting were the three predictive frameworks developed alongside experimental work. All three tracked closely with measured tribological outcomes. Prediction accuracies reached up to 95.4% with lower error values documented across every model. The 2% fly ash formulation stood out as the most effective composition tested. It delivered the strongest combined improvements in wear resistance and friction stability while remaining fully compatible with the operational demands of additive manufacturing. The Author(s), under exclusive licence to Springer Nature Switzerland AG 2026.
Keshavamurthy, R.; Suma, V.; Ramesh, C.S.; Rajhi, Ali A.; Duhduh, Alaauldeen A.; Ravitej, Y.P.
Journal of Bio- and Tribo-Corrosion;Volume;12;Issue;2;Article No.;91;
Springer Science and Business Media Deutschland GmbH
Restricted Access; Hardcopy may be available in the library
https://doi.org/10.1007/s40735-026-01169-y https://www.scopus.com/pages/publications/105039439398?origin=resultslist
Keshavamurthy R., Department of Mechanical and Automobile Engineering, Christ University, Karnataka, Bangalore, 560074, India; Suma V., Department of Computer Science and Design, Dayananda Sagar College of Engineering, Karnataka, Bangalore, 560078, India; Ramesh C.S., Department of Mechanical Engineering, GM University, Karnataka, Davanagere, India; Rajhi A.A., Department of Mechanical Engineering, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia; Duhduh A.A., Department of Mechanical Engineering Technology, CAIT, Jazan University, P.O. Box 114, Prince Mohammed Street, Jazan, 45142, Saudi Arabia; Ravitej Y.P., Department of Mechanical Engineering, Dayananda Sagar University, Karnataka, Bangalore, India
Experimental investigation of a biomass-derived nanofluid with enhanced thermal conductivity as a green, sustainable heat-transfer medium and qualitative comparison via mathematical modelling
In this study, bio-based carbon nanospheres (CNSs) were synthesized from lignocellulosic-rich groundnut skin (Arachis hypogaea) and tested for their practical application in nanofluids (NFs) for enhanced heat transfer. The CNSs were characterized using various techniques, including FESEM, EDS, XRD, Raman spectroscopy, zeta potential analysis, and FTIR. Thermal conductivity (TC) and viscosity measurements were conducted using transient plane source (TPS) technique with a Hot Disk thermal analyser and discovery hybrid rheometer, respectively. The nanoparticles (NPs) were dispersed in two base fluids: ethylene glycol (EG) and a 60 : 40 mixture of deionized water (DI) and EG. Optimization studies were performed by varying the stirring and measurement times to improve TC values. The results showed that when a power source of 40 mW was applied at a high concentration of nanoparticles (i.e., 0.1 wt%), there was a 91.9% increment in thermal conductivity (TC) compared to the base fluid EG. DI-EG-based nanofluids (NFs) exhibited enhancements of up to 45% compared to the base fluid DI-EG (60 : 40), with a heating power of 80 mW and concentration of 0.1 wt%. These results demonstrated significant TC improvements with NP incorporation. Further experiments were performed by varying the temperature in the range of 30-80 C with readings taken for every 10 C increase, which showed a direct relation with the TC values. At 80 C, EG-based NFs showed increments of 77%, 111.49%, 139.67% and 175% at 0.01, 0.02, 0.05 and 0.1 wt% concentrations of NPs, respectively. It was also found that with the increase in the concentration of NPs, viscosity increased, whereas an increase in the temperature led to a decrease in viscosity. The CNS nanofluid exhibited a Newtonian behaviour with the nanoparticle concentration and temperature, resulting in an approximately 114% enhancement compared to the base fluid when the concentration of CNSs was 0.1 wt% at 30 C but decreased by up to 18% when the temperature was increased to 90 C. Using appropriate mathematical models for assessing thermophysical quantities, it was discovered that the model values and experimental values correspond reasonably well. Our method thus validates our experimental results and deepens the understanding of the mechanisms behind enhancing thermal conductivity in biomass-derived nanofluids. In summary, our work advances sustainable nanomaterial synthesis, providing a new solution for boosting thermal conductivity while maintaining environmental integrity, thereby inspiring further research and innovation in this field. 2024 RSC.
Bijapur K.; Mandal S.; Siddheshwar P.G.; Bose S.; Hegde G.
Nanoscale Advances, Vol-6, No. 19, pp. 4944-4955.
All Open Access; Gold Open Access; Green Open Access
https://doi.org/10.1039/d4na00362d https://www.scopus.com/inward/record.uri?eid=2-s2.0-85201079006&doi=10.1039%2fd4na00362d&partnerID=40&md5=9e5622d93d0f1f82663060bc3da5970b
Bijapur K., Department of Chemistry, Christ University, Hosur Road, Bengaluru, 560029, India, Centre for Advanced Research and Development (CARD), Christ University, Hosur Road, Bengaluru, 560029, India; Mandal S., Department of Materials Engineering, Indian Institute of Science, Bengaluru, 560012, India; Siddheshwar P.G., Centre for Mathematical Needs, Department of Mathematics, Christ University, Hosur Road, Bengaluru, 560029, India; Bose S., Department of Materials Engineering, Indian Institute of Science, Bengaluru, 560012, India; Hegde G., Department of Chemistry, Christ University, Hosur Road, Bengaluru, 560029, India, Centre for Advanced Research and Development (CARD), Christ University, Hosur Road, Bengaluru, 560029, India
Experimental Investigation of Air Circulation Using Duct System in a Non-AC Bus Coach
Air Circulation; Non-AC Bus; Passenger Comfort; Pollution
Public transport is the life line in many of the developing and under developed countries for the safe conveyance, i.e. also consider as economical. The major limitation in public transport (non-AC busses) Air Condition, is the lack of proper air circulation leading to suffocation and vomiting. The present research work emphasis on design and analysis of air flow duct system (non AC Busses) to increase the level of comfortance of the passengers, tools like solidworks software 2016 is used for 3D drawing, Hypermesh software 13.0 is for the discretization and ANSYS Fluent software 16.0 for the Computational Fluid Dynamic (CFD) analysis, from the experimental the airflow is found to be 10 m/s, and from the numerical analysis the airflow is found to be 9.8 m/s, by comparing the experimental and numerical results a negligible deviation of 2% is observed and it is within the limit. Published under licence by IOP Publishing Ltd.
Niranjana S.J.; Kubsad S.S.; Nagaraj Y.; Manjunath S.; Shivakumar S.
IOP Conference Series: Materials Science and Engineering, Vol-1065, No. 1
Niranjana S.J., Department of Mechanical Engineering, School of Engineering and Technology, CHRIST (Deemed to Be University), Bengaluru, Karnataka, 560076, India; Kubsad S.S., Department of Mechanical Engineering, Atria Institute of Technology, Bengaluru, Karnataka, 560024, India; Nagaraj Y., Department of Mechanical Engineering, SJM Institute Technology, Chitradurga, Karnataka, 577502, India; Manjunath S., Department of Mechanical Engineering, School of Engineering and Technology, CHRIST (Deemed to Be University), Bengaluru, Karnataka, 560076, India; Shivakumar S., Department of Mechanical Engineering, School of Engineering and Technology, CHRIST (Deemed to Be University), Bengaluru, Karnataka, 560076, India
Experimental investigation of boundary shear stress in meandering channels
Laboratory experimentation for bed shear stress distribution has been carried out in two sets of meandering channels. The channels have cross-over angles of 110 and 60 constructed by 'sine-generated' curves over a flume of 4?m width. Variations in bed roughness were studied for the meandering main channel. Bed shear stress distribution across a meandering length for the 110 and 60 channels was examined for different sinuosities and roughnesses. The boundary shear stress study illustrated the position of maximum shear along the apex section and across the meandering path. These variations were observed for different flow depths. A comparison of the bed shear among the three experimental channels was conducted, and the results were analyzed. 2023 Author(s).
Sudhir M.R.; Pradhan A.; Sahoo K.; Beulah M.; Mohanta A.; Sethy K.
AIP Conference Proceedings, Vol-2763, No. 1
https://doi.org/10.1063/5.0158579 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85176722706&doi=10.1063%2f5.0158579&partnerID=40&md5=ab8480ec0dfb637322d407ec1ea83a3b
Sudhir M.R., Department of Civil Engineering, CHRIST, Deemed to Be University, Karnataka, Bangalore, 560074, India; Pradhan A., Department of Civil Engineering, CHRIST, Deemed to Be University, Karnataka, Bangalore, 560074, India; Sahoo K., School of Civil Engineering, KIIT Deemed to Be University, Odisha, Bhubaneswar, 751024, India; Beulah M., Department of Civil Engineering, CHRIST, Deemed to Be University, Karnataka, Bangalore, 560074, India; Mohanta A., Department of Mechanical Engineering, Vellore Institute of Technology, Tamil Nadu, Vellore, 632014, India; Sethy K., Government College of Engineering Kalahandi, Bhawanipatna, India
Experimental investigation of Glass Laminate Aluminium Reinforced Epoxy characteristics influences through low velocity impact test
drop weight test; GLARE; low-velocity impact; SEM
The fibre being one of the recently implemented advanced materials in distinctive applications is being reinforced with metals to constitute a unique composite laminate. This reinforcement will enhance the sustenance property of the laminate used in automotive sectors. In most automotive sectors, drop weight analysis at varying velocity ranges is performed to evaluate the damage characteristics of the vehicle body. Hence, the present work leads us through the study on influence of low-velocity impact at varying heights over the Glass Laminate Aluminium-Reinforced Epoxy (GLARE) laminate characteristics. Here, the laminate of constant thickness was subjected to drop weight impact. Three distinct thicknesses of (0.2, 0.3 and 0.4 mm) Al-2024 T3 aluminium alloy were used. The results indicate that laminate can sustain up to critical load in terms of impact velocity as 3.13 m/s, and beyond which, it leads to delamination damage at 3.49 m/s. The above results indicate that the maximum absorbed energy by the laminate before catastrophic failure (crack) was noticed to be 14.43 J in the case of sample B. Further, it is noticed that GLARE laminate with 0.3 mm face sheet thickness has best results with reference to both absorbed energy and damage when compared with other thicknesses. 2022 Informa UK Limited, trading as Taylor & Francis Group.
Advances in Materials and Processing Technologies, Vol-9, No. 2, pp. 689-701.
Kumar M H., Department of Automobile Engineering, CHRIST (Deemed to Be University), Bengaluru, India; Mathivanan N.R., Department of Mechanical Engineering, PES University, Bangalore, India
Experimental Investigation of Nano Hexagonal Boron Nitride Reinforcement in Aluminum Alloys Through Casting Method
AA 7050; Aluminum metal matrix composites; Nano hexagonal boron nitride; Nanocomposites; Sir casting
Aluminum metal matrix composites (AlMMCs) have a significant impact on a variety of industries that seek for innovation, efficiency, and sustainability. AlMMCs are substantial because of the special combination of properties that make them an essential part of contemporary production and design. Custom made properties of the AlMMCs can be obtained by the reinforcing different ceramic particles. Among the reinforcements, nano hexagonal boron nitride were rarely used. Hexagonal boron nitride particles have self-lubrication properties and it is one of the promising substitutes of graphite. The incorporation of hexagonal boron nitride (hBN) as a reinforcement material in aluminum alloys has garnered significant attention in recent years. This paper provides an overview of the reinforcement of nano hBN in aluminum alloys through casting method and highlights the mechanical and thermal properties of these alloys. The results show that the wear rate of the composite at 2wt.% is 9.91% lower for a load of 40 N when compared to unreinforced composite. Furthermore, the impact of hBN content, dispersion, and processing parameters on the properties of the composites is analyzed. The unique structural and thermal properties of hBN, along with excellent lubricating abilities, make it a promising candidate for reinforcing aluminum composites. The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.
Springer Proceedings in Physics, Vol-415 SPP, pp. 311-318.
Menachery N., Department of Mechanical Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, India, Department of Mechanical Engineering, Jyothi Engineering College, Kerala, Thrissur, India; Thomas S., Department of Mechanical Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, India; Deepanraj B., Department of Mechanical Engineering, College of Engineering, Prince Mo-hammad Bin Fahd University, Al Khobar, Saudi Arabia
Experimental investigation of plain and nano-graphene oxide mixed dielectric for sustainable EDM of Nimonic alloy using Cu and Brass electrode: A comparative study
Electro discharge machining; Material removal rate; Nano graphene oxide mixed dielectric; Surface roughness; Tool wear rate
The current research investigates the machinability of a novel Nimonic alloy through electro-discharge machining by assessing Material Removal Rate, Tool Wear Rate and Surface Roughness. The machining was conducted using plain dielectric and Graphene Oxide (GO) nanoparticles (5 g/l) mixed dielectric considering both Copper and Brass electrode. The novelity lies when machining with nano GO mixed dielectric. It was observed that the use of Copper electrode in machining of the alloy in nano GO mixed dielectric results in superior quality machining, demonstrating enhanced performance. The key findings include the identification of optimal parameters, where Vg of 70 V, Ton of 200 s, Fp of 0.5 kgf/mm2 maximize MRR (16.231 mm3/min) and minimize TWR (0.0062 mm3/min) and SR (5.1423 m). The microstructural study of the machined surface and sustainability study along with the detailed comparative analysis of responses assures the superiority of machining in Nano GO mixed dielectric-Cu electrode environment. 2024 Elsevier Ltd
Behera, Asit; Kumar Sahoo, Ashok; Sankar Mahapatra, Siba
Measurement: Journal of the International Measurement Confederation;Volume;241;Issue;;Article No.;115659;
All Open Access; Hybrid Gold Open Access
https://doi.org/10.1016/j.measurement.2024.115659 https://www.scopus.com/pages/publications/85203446947?origin=resultslist
Behera A., School of Mechanical Engineering, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar-24, Odisha, India; Kumar Sahoo A., School of Mechanical Engineering, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar-24, Odisha, India; Sankar Mahapatra S., Department of Mechanical Engineering, National Institute of Technology, Odisha, Rourkela, India
Experimental Investigation of Salt Hydrate Phase-Change Material (Shape-Stabilized) Applied to a Solar Collector
Direct absorption; Salt hydrate; Shape-stabilized phase-change material; Solar power; Thermal conversion
A complex element of water heater by solar power involves the requirements of storage tank, which not only occupies considerable space but also adds com-plexity to the plumbing and installation procedures; this research marks the initial endeavor to practically utilize shape-stabilized (SS) phase-change material (PCM) within a tank-less, evacuated tube with direct absorption (ET-Direct Absorption) solar collector. The primary objective was to tackle challenge of storage of the solar power. A PCM (salt hydrate) was proposed, with different component concentrations explored to determine the most effective mixture. Once the optimal compound was identified, it underwent rigorous testing over numerous cycles to ensure its sustainable its storing capabilities. Additionally, the planetary system was charged in dormancy mode (without flow of water) and subsequently discharged at the rate of flows of 15, 25, and 35 liters per hour (LPH). Results indicated a note-worthy improvement in efficiency of the heat system in the stasis mode, which increases from 62 to 80% with the utilization of this heat storing cum collecting unit. Moreover, it was observed that transitioning from a rate of flow of 1525 LPH had minimal impact on the collec-tors heat gain, but using a rate of flow of 35 LPH sig-nificantly reduced efficiency of discharge. The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.
Kannakumar K.; Manikandan P.; Girimurugan R.; Sahoo D.K.; Krishna Kishore S.V.; Rasagopal P.
Advances in Science, Technology and Innovation, Vol-2024, pp. 189-195.
Kannakumar K., Department of Mechanical Engineering, Shree Venkateshwara Hi-Tech Engineering College, Tamil Nadu, Gobichettipalayam, 638 455, India; Manikandan P., Department of Electrical and Electronics Engineering, KSR Institute for Engineering and Technology, Tamil Nadu, Tiruchengode, 637 215, India; Girimurugan R., Department of Mechanical Engineering, Nandha College of Technology, Tamil Nadu, Perundurai, 638 052, India; Sahoo D.K., School of Mechanical Engineering, Sathyabama Institute of Science and Technology, Tamil Nadu, Chennai, 600 119, India; Krishna Kishore S.V., Department of Marketing, School of Business and Management, Christ (Deemed to be University), Bangalore Kengeri Campus, Karnataka, Bengaluru, 560 074, India; Rasagopal P., Department of Mechanical Engineering, KSR College of Engineering, Tamil Nadu, Tiruchengode, 637 215, India
Experimental investigation of tribocorrosion
Abrasion; Adhesion; Corrosion; Electrochemistry; Erosion; Impact; In situ; Mechanisms; Temperature; Tribocorrosion
This chapter discusses various techniques available for evaluation of tribocorrosion behavior of industrial components, their applications, and limitations. Numerous influential factors of tribocorrosion, their mechanisms, and their characteristics have been discussed at length. Further, a case study of tribocorrosion behavior of aluminum-based in situ metal matrix composites have been deliberated comprehensively. 2021 Elsevier Inc. All rights reserved.
Keshavamurthy R.; Ramesh C.S.; Pradeep Kumar G.S.; Tambrallimath V.
Tribocorrosion: Fundamentals, Methods, and Materials, pp. 17-42.
Keshavamurthy R., Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bangalore, India; Ramesh C.S., Department of Mechanical Engineering, Presidency University, Bangalore, India, Presidency University, Bangalore, India; Pradeep Kumar G.S., Department of Mechanical Engineering, Dayananda Sagar College of Engineering, Bangalore, India, Department of Mechanical Engineering, Christ University, Bangalore, India, Department of Automobile Engineering, Christ University, Bangalore, India; Tambrallimath V., Department of Automobile Engineering, Dayananda Sagar College of Engineering, Bangalore, India
Experimental investigation of turbulent flow behavior in an air to air double pipe heat exchanger using novel para winglet tape
Friction factor; Nusselt number; Para-winglet tape inserts; Performance optimization index; Thermal and flow behavior
Double pipe Heat exchangers are some of the important equipment which is seen in a variety of industrial applications. In the current study a new type of insert, namely Para-Winglet Tape inserts are investigated for thermal and flow behavior from Reynolds number 6000 to 30000. The Para-Winglet Tape inserts are investigated for three sets of pitches and para-inclinations. The inclusion of para-winglet tape on the tube has intensified the turbulent kinetic energy and has resulted in recirculation in-between the inserts. The arrangement of the para-winglet tape has proved their worthiness over the plain tube. The highest Nusselt number was obtained for Case9 at Reynolds number 30000 with an enhancement of 407% and the least was obtained by Case7 at Reynolds number 6000 with an enhancement of 88% compared to plain double pipe heat exchanger. The highest friction factor was obtained for Case3 at Reynolds number 30000 with an enhancement of 846% and the least was obtained by Case7 at Reynolds number 24000 with an enhancement of 286% compared to plain double pipe heat exchanger. The maximum and minium performance optimization index value of 2.69 and 1.09 was achieved for Case9 and Case1 at Reynolds number 30000 and 6000. 2020 The Author(s).
Thejaraju R.; Girisha K.B.; Manjunath S.H.; Dayananda B.S.
Case Studies in Thermal Engineering, Vol-22
https://doi.org/10.1016/j.csite.2020.100791 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097611068&doi=10.1016%2fj.csite.2020.100791&partnerID=40&md5=246c0562dd2cd68426a0413d15ef0c9e
Thejaraju R., Department of Mechanical and Automobile Engineering, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, India; Girisha K.B., Department of Mechanical Engineering, BGSIT-Adichunchanagiri University, BG Nagara, 571448, India; Manjunath S.H., Department of Mechanical Engineering, BGSIT-Adichunchanagiri University, BG Nagara, 571448, India; Dayananda B.S., Department of Mechanical and Manufacturing Engineering, MS Ramaiah University of Applied Sciences, Bangalore Karnataka, 560054, India
Experimental Investigation of Uniaxial Compressive Behavior of Composite Columns without and with Full and Partial CFRP Wraps
Experimentation; Modeling; Partial and full carbon confinement; Square columns
Concrete columns are the backbone of any major structure, and their strengthening, repair, and retrofit have always drawn special research attention. One of the techniques for strengthening and improving the ductility of concrete columns has been the application of carbon fiber-reinforced polymer (CFRP) materials. A total of 43 columns of different configurations were experimentally investigated to evaluate the uniaxial compressive behavior of composite columns. Experimental and international code-recommended load-carrying capacities, stress-strain relations, axial stiffness, ductility factor, and failure modes were examined in the study. When fully wrapped, the strength of both plain cement concrete and reinforced cement concrete columns improved by 21% each with reference to the unwrapped columns. In addition to providing the advantages of external confinement to the columns, full wrapping contributed to a strength increment of 21%, which compared well with the steel reinforcement contribution to a strength increment of 28% to 39%. The partial wrapping technique was found to be an economical alternative to the full wrapping technique, with strength enhancements of 6% to 12% in the case of both plain cement concrete and reinforced cement concrete partially wrapped columns. Two regression models for the load-carrying capacity for columns with and without wraps were developed with four key performance parameters: percentage steel reinforcement, percentage concrete, percentage carbon fiber-reinforced polymer wrap, and the weight of the specimen. The formulated models were validated and found to be robust and consistent with the results. 2024 American Society of Civil Engineers.
Practice Periodical on Structural Design and Construction, Vol-29, No. 3
American Society of Civil Engineers (ASCE)
https://doi.org/10.1061/PPSCFX.SCENG-1399 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85189303876&doi=10.1061%2fPPSCFX.SCENG-1399&partnerID=40&md5=ab2ffac434ee0fa81b8851e5478c5b4b
Sudhir M.R., Dept. of Civil Engineering, Soet, Christ (Deemed to Be University), Karnataka, Bangalore, 560074, India; Beulah M., Dept. of Civil Engineering, Soet, Christ (Deemed to Be University), Karnataka, Bangalore, 560074, India
Experimental Investigation on Density and Volume Fraction of Void, and Mechanical Characteristics of Areca Nut Leaf Sheath Fiber-Reinforced Polymer Composites
Natural fiber-reinforced polymer composite is a rapidly growing topic of research due to the simplicity of obtaining composites that is biodegradable and environmentally friendly. The resulting composites have mechanical properties comparable to synthetic fiber-reinforced composites. In this regard, the present work is formulated with the objectives related to the development, characterization, and optimization of the wt% of reinforcements and the process parameters. The novelty of this work is related to the identification and standardization of the appropriate wt% of reinforcements and parameters for the processing of the areca nut leaf sheath fiber-based polymer composites for enhanced performance attributes. With this basic purview and scope, the composites are synthesized using the hand layup process, and the composite samples of various fiber compositions (20%, 30%, 40%, and 50%) are fabricated. The mechanical characteristics of biodegradable polymer composites reinforced with areca nut leaf sheath fibers are investigated in the present work, with a focus on the effect of fiber composition (tensile properties, flexural strength, and impact strength). The properties of composites are enhanced by combining the areca nut leaf sheath fiber and epoxy resin, with a fiber content of 50% being the optimal wt%. The Scanning electron microscopy (SEM) investigations also ascertain this by depicting the good interfacial adhesion between the areca nut leaf sheath fiber and the epoxy resin. The tensile strength of the composite specimen reinforced with 50% areca nut fiber increases to 44.6 MPa, while the young's modulus increases to 1900 MPa, flexural strength increases to 64.8 MPa, the flexural modulus increases to 37.9 GPa, and impact strength increases to 34.1 k J/m2. As a result, the combination of areca nut leaf sheath fiber reinforced epoxy resin shows considerable potential as a renewable and biodegradable polymer composite. Furthermore, areca nut leaf sheath fiber-reinforced epoxy resin composites are likely to replace petroleum-based polymers in the future. The ecosustainability and biodegradability of the composite specimen alongside the improved mechanical characteristics serve as the major highlight of the present work, and can help the polymer composite industry to further augment the synthetic matrix and fiber-based composites with the natural fiber-reinforced composites. 2022 B. A. Praveena et al.
Praveena B.A.; Santhosh N.; Buradi A.; Srikanth H.V.; Shankar G.; Ramesha K.; Manjunath N.; Karthik S.N.; Rudra Naik M.; Praveen Kumar S.
International Journal of Polymer Science, Vol-2022
https://doi.org/10.1155/2022/6445022 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85143435107&doi=10.1155%2f2022%2f6445022&partnerID=40&md5=43b801fb60be8d7c6e339e52f79bfb9e
Praveena B.A., Department of Mechanical Engineering, Nitte Meenakshi Institute of Technology, Karnataka, Bengaluru, 560064, India; Santhosh N., Department of Mechanical Engineering, MVJ College of Engineering, Karnataka, Bengaluru, 560067, India; Buradi A., Department of Mechanical Engineering, Nitte Meenakshi Institute of Technology, Karnataka, Bengaluru, 560064, India; Srikanth H.V., Department of Aeronautical Engineering, Nitte Meenakshi Institute of Technology, Karnataka, Bengaluru, 560064, India; Shankar G., Department of Mechanical Engineering, MVJ College of Engineering, Karnataka, Bengaluru, 560067, India; Ramesha K., Department of Mechanical and Automobile Engineering, School of Engineering and Technology, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560074, India; Manjunath N., Department of Sciences and Humanities, School of Engineering and Technology, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560074, India; Karthik S.N., Department of Mechanical Engineering, New Horizon College of Engineering, Karnataka, Bangalore, 560103, India; Rudra Naik M., Department of Electro Mechanical Engineering, Arba Minch University, Sawla Campus, Ethiopia; Praveen Kumar S., Faculty of Mechanical Engineering, Arba Minch Institute of Technology, Arba Minch University, Ethiopia
Experimental investigation on the effect of varying percentage of E-waste particulate filler in GFRP composite laminates
E-waste particulate fillers; Flexural strength; GFRP composite laminates; Mechanical characterization; Shore D tests
The advent of newer technology increases the electrical and electronic devices into the market in a rapid phase, thereby causing the previous generation gadgets to become obsolete, in spite of the gadgets being in good working condition. This is one of the main causes for the increase of E-waste. In the past two years itself the e-waste has gone up by 8% with respect to weight globally. An attempt is made to utilize the e-waste in a productive manner as a filler material and study its characteristics when subjected to different mechanical tests. This paper describes the fabrication and mechanical characteristics of new polymer composites consisting of E-glass fiber reinforcement along with filler material. Study of composites play a very important role in material science, metallurgy, chemistry, solid mechanics and engineering applications. The specimens were fabricated with the help of hand layup technique followed by vacuum bagging process. Mechanical tests viz., tensile test, Flexural test, and Shore D test has been performed. Samples were made of three different compositions of E-waste filler particulate, 5%, 10% and 15%. These tests have been conducted to find out the impact of varying percentage of filler material on the composite laminates. With the increase in the percentage of e-waste filler, there is a reduction in the tensile strength of the laminate, while the flexural strength of the laminates increased with increase in the filler material. The laminate with 5% filler material exhibited higher hardness than the other two samples. 2019 Elsevier Ltd.
Mathivanan N.R.; Aiyappa A.C.; Kumar M.H.
Materials Today: Proceedings, Vol-28, pp. 1130-1134.
https://doi.org/10.1016/j.matpr.2020.01.094 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85087816143&doi=10.1016%2fj.matpr.2020.01.094&partnerID=40&md5=33e5415c4aef99c98216d2a255606fe1
Mathivanan N.R., Department of Mechanical Engineering, Pes University, Bangalore, 560085, India; Aiyappa A.C., Department of Mechanical Engineering, Pes University, Bangalore, 560085, India; Kumar M.H., Department of Mechanical and Automobile Engineering, Christ University, Bangalore, 560074, India
Experimental Investigations on Erosion-Corrosion Characteristics of HVOF-Sprayed WC-10% Ni Coatings Deposited on Aluminum Alloy
The current work investigates the erosion-corrosion behaviour of thermally sprayed tungsten carbide-10% nickel (WC-10% Ni) coatings placed on the AA6061 aluminum alloy. The AA6061 aluminum alloy was coated with tungsten carbide -10% nickel coatings utilising a high-velocityoxy-fuel (HVOF) spray method. The microstructure and hardness of thermally sprayed coatings were examined using a scanning electron microscope (SEM) and a Vickers hardness tester. The slurry erosion-corrosion wear tests were carried out by varying the parameters of the slurry erosion process, such as testing time, slurry content, slurry speed, and impinging particle size, on the erosion testing equipment. The data demonstrated that when slurry concentration, slurry speed, and impinging particle size increased, so did the slurry erosion-corrosion wear loss. The wear processes of uncoated and thermally sprayed tungsten carbide -10% nickel have been examined using SEM and a 3-D confocal microscope. Copyright 2023 G. S. Pradeep Kumar et al.
Kumar G.S.P.; Sunkad S.; Jogeshwar R.; Keshavamurthy R.; Tambrallimath V.; Jangam S.; Basheer D.
Advances in Materials Science and Engineering, Vol-2023
https://doi.org/10.1155/2023/8533871 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149127149&doi=10.1155%2f2023%2f8533871&partnerID=40&md5=e051aa6b56c875b3f23e6736bba467c1
Kumar G.S.P., Department of Mechanical and Automobile Engineering Christ University, Karnataka, Bangalore, 560074, India; Sunkad S., Automobile Engineering Christ University, Karnataka, Bangalore, 560074, India; Jogeshwar R., Automobile Engineering Christ University, Karnataka, Bangalore, 560074, India; Keshavamurthy R., Department of Mechanical Engineering Dayananda Sagara College of Engineering, Karnataka, Bangalore, 560078, India; Tambrallimath V., Department of Aeronautical and Automobile Engineering Manipal Institute of Technology Manipal Academy of Higher Education, Karnataka, Manipal, 576104, India; Jangam S., Department of Mechanical and Automobile Engineering Christ University, Karnataka, Bangalore, 560074, India; Basheer D., Department of Mechanical Engineering Haramaya Institute of Technology Haramaya Univeristy, Dire Dawa, 138, Ethiopia