Onset of double-diffusive convection in water and ester based magnetic nanofluids

Abstract

The present paper studies the onset of double diffusive convection in water based magentic nanofluids (WMNF) and ester based magnetic nanofluids (EMNF) for a thin horizontal layer. The fluid is heated and salted from below. The effect of three important slip mechanisms viz., Brownian diffusion, thermophoresis and magnetophoresis has been incorporated. The Eigen value problem is solved by the numerical method. The results are presented for rigid-rigid boundaries in the gravity environment. Critical Rayleigh number is determined in terms of the governing non-dimensional parameters like solutal Rayleigh number, solutal Lewis number and nanoparticle concentration Rayleigh number.