Nonequilibrium flow of a radiating gas in a vertical channel with axial temperature variation

Buoyancy induced flow of a vibrationally relaxing radiating gas in a vertical channel is studied for the case when one of the channel walls is cold while the other is hot. On the hot wall there is superimposed a small axial linear wall temperature variation. Perturbation expansions are developed for the solution and the basic problem which is nonlinear is integrated in a close form for an optically thin grey gas. The next approximation is linear and so is tackled by a fourth order Runge-Kutta method. Quantitative discussions of the solutions are presented. (author). 6 refs, 2 figs