Effect of temperature/gravity modulation on the onset of magneto-convection in weak electrically conducting fluids with internal angular momentum
Linear stability; Magnetic field; Modulation; Natural convection; Rayleigh-Benard
The effect of time-periodic temperature/gravity modulation at the onset of magneto-convection in weak electrically conducting fluids with internal angular momentum is investigated by making a linear stability analysis. The Venezian approach is adopted in arriving at the critical Rayleigh and wave numbers for small amplitude temperature/gravity modulation. The temperature modulation is shown to give rise to sub-critical motion and gravity modulation leads to delayed convection. An asymptotic analysis is also presented for small and large frequencies. 1999 Elsevier Science B.V.
Journal of Magnetism and Magnetic Materials, Vol-192, No. 1, pp. 159-176.
Siddheshwar P.G., UGC-DSA Center in Fluid Mechanics, Dept. Math., Bangalore Univ., C., Bangalore-560 001, India; Pranesh S., Department of Mathematics, Christ College, Hosur Road, Bangalore-560 029, India