Numerical simulation of internal heat generation and absorption on magnetohydrodynamic mixed convection heat transfer in an enclosure having variable undulation in vertical walls

Abstract

Mixed convection heat transfer performance in presence of a magnetic field in an enclosure having variable undulation in vertical walls under the impact of internal heat generation and absorption has been studied numerically in this thesis. The governing equation consisting of a set of non-linear differential equations in thisMagneto-hydrodynamic (MHD) mixed convection problem is intrinsically non-linear as well as coupled. The investigations are conducted for different values of Reynolds number (0.1≤Re≤10),Grashof number (〖10〗^3≤Gr≤〖10〗^6), Richardson number (0.1≤Ri≤10),Undulations number (1≤λ≤3), heat absorption and generation(-6≤∆≤6) but for fixedamplitude withHa=20 whereas Prandtl number is kept constant at 0.70. Various characteristics such as streamlines, isothermsand heat transfer rate in terms ofthe average Nusselt number (〖Nu〗_av) and average fluid temperature (θ_av) are presented for the aforementionedparameters. The results indicate that the mentioned parameters strongly affect the flow phenomenon andtemperature field inside the wavy cavity.It may be claimed that, heat transfer performance could be enhanced 3.8% for heat absorption to heat generation. The results of this study conformed very well with the publishedones.