MHD studies on the free convection and Hall effects on waves in a semi-infinite plasma

Analytical MHD studies are carried out on the propagation of oscillatory waves in a semiinfinite plasma which is exposed to an applied magnetic field. The oscillatory wave is introduced in the plasma environment by temperature perturbation. The phase speeds of the resultant disturbance are discussed in terms of Grashof, Prandtl, and Eckert numbers (free-convection parameters), Hall parameter, Alfven parameter, and frequencies. Expansion around a small Eckert number is performed to solve the very nonlinear coupled partial differential equations for the field variables. (AIAA)