Thermo-diffusion MHD convection in enclosure using heat and mass lines visualization techniques

The numerical study of two-dimensional laminar thermo-diffusion natural convection in an exponentially heated and concentrated square enclosure of unit length in the presence of a uniform horizontal magnetic field is presented in this paper.The left and right vertical walls are assumed to have higher and lower temperatures and concentrations, respectively, and are governed by exponential functions, whereas the horizontal walls are assumed to be adiabatic and non-diffusive.The mathematical formulation of heat and mass functions has been completed, and heat and mass line contours have been drawn based on these functions to investigate the behavior of heat and mass in the cavity.The flow governing equations were solved using a finite difference method in conjunction with the Successive Over-Relaxation (SOR) technique and then converted to a vorticity-stream function form.A detailed comparison of isotherms with heatlines and isosolutes with masslines has been performed.Furthermore, the reduction for lower Rayleigh numbers Ra surpassing the reduction for higher values of Ra.The maximum reduction in overall heat and mass transfer has been observed for higher Hartmann (Ha = 8).

Abstract licence: CC BY-NC-ND

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