Numerical investigation of two-phase mixed convection flow of particulate oldroyd-B fluid with non-linear thermal radiation and convective boundary condition
Convective boundary condition; Fluid-particle suspension; Mixed convection flow; Nonlinear thermal radiation; Oldroyd-B fluid; Stretching sheet
The present investigation addresses the mixed convection two-phase flow of dusty Oldroyd-B fluid towards a vertical stretching surface in the presence of convective boundary condition and nonlinear thermal radiation. The fluid and dust particles motion is coupled only in the course of drag and heat transfer between them. The Stokes linear drag theory is employed to model the drag force. The numerical solutions based on the Runge-Kutta-Fehlberg scheme with shooting method are presented for both fluid and particle phase velocity and temperature fields. Further, numerical results are obtained for skin friction factor and local Nusselt number of prescribed values of pertinent parameters. The results are presented graphically and the physical aspects of the problem are analyzed. The obtained results are validated with existing results and found to be in good agreement. It is established that the mass concentration of the dust particle parameter plays a key role in controlling flow and thermal behaviour of non-Newtonian fluids. An asymptotic state occurs in the rate of heat transfer for larger values of the Biot number. It is also proved that the significance of radiation effect in nonlinear form is outstanding in comparison with the traditional linear radiation effect. The momentum boundary layer thickness for both fluid and dust phase become loftier due to the consequence of buoyancy force. 2018 Trans Tech Publications, Switzerland.
Gireesha B.J.; Mahanthesh B.; Krupalakshmi K.L.
Defect and Diffusion Forum, Vol-388, pp. 204-222.
https://doi.org/10.4028/www.scientific.net/DDF.388.204 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063081966&doi=10.4028%2fwww.scientific.net%2fDDF.388.204&partnerID=40&md5=30464eba47cdf041c4c8cef5c656d0c8
Gireesha B.J., Department of Studies and Research in Mathematics, Kuvempu University, Shankarghatta, Shimoga, Karnataka, 577451, India; Mahanthesh B., Department of Mathematics, Christ University, Bangalore, 560058, India; Krupalakshmi K.L., Department of Studies and Research in Mathematics, Kuvempu University, Shankarghatta, Shimoga, Karnataka, 577451, India