LAPLACE TRANSFORMATION FOR AN OPTICALLY THICK GRAY GAS IN A VERTICAL CHANNEL WITH MAGNETIC BODY FORCE: ROSSELAND APPROXIMATION

A Couette flow of an optically thick gray gas flowing in a vertical channel is analyzed analytically with consideration of the buoyancy effects and thermal radiation. The Rosseland diffusion flux approximation is employed to simulate the radiative heat transfer contribution. An impulsive movement and a uniformly accelerated movement of one plate are considered with the second plate being stationary. The numerical results for some special cases are compared with the exact solutions and are found to be in good agreement. The effects of the flow parameters on the nondimensional velocity and skin friction are revealed.
  Автор:  Kalita K., Ahmed S.
Ключевые слова:  optically thick gray gas, vertical channel, Rosseland approximation, Laplace transform, thermofluid dynamics, impulsive plate movement.
Стр:  965