Effects of nonuniform temperature gradient and magnetic field on the onset of convection in fluids with suspended particles under microgravity conditions

摘要

The effects of a nonuniform temp. gradient and magnetic field on the onset of convection driven by surface tension in a horizontal layer of Boussinesq fluid with suspended particles confined between an upper free​/adiabatic boundary and a lower rigid​/isothermal boundary are considered. A linear stability anal. is performed. The microrotation is assumed to vanish at the boundaries. The Galerkin technique is used to obtain the eigenvalues. The effect of various parameters on the onset of convection was analyzed. Six different nonuniform temp. profiles are considered and their comparative effect on onset is discussed. It is obsd. that the elec. conducting fluid layer with suspended particles heated from below is more stable compared to the classical elec. conducting fluid without suspended particles. The crit. wave no. is insensitive to the changes in the parameters but sensitive to the changes in the Chandrasekhar no. The problem has possible applications in microgravity space situations.