EFFECT ON HEAT TRANSFER AND THERMAL DEVELOPMENT OF A RADIATIVELY PARTICIPATING FLUID IN A CHANNEL FLOW

The paper deals with Simultaneous heat transfer by convection and radiation in a channel flow between two infinite black parallel plates is investigated. The effect of radiation on the heat transfer and the full thermal development of the flow is stu died. The effect of scattering albedo, conduction- radiation parameter and the optical thickness are e xamined. The radiation is shown to substantially alter the heat transfer downstream before the therm ally fully developed conditions. The full thermal development is shown to exist for the constant wall temperature case, while it is pushed further downstream and could not be seen for the constant w all heat flux case. While the radiation greatly affects the heat transfer when the fluid is heated, for the cooling case radiation effect decreases along the stream wise direction and vanishes at the fully developed conditions.