On the thermal field of a separating wall jet

Thermal wall jets are found in a variety of applications in geophysics, mam malian physiology and electronics, to name but a few. The thermal field of a separating wall jet is studied for a range of values of the Prandtl numbe r of the fluid. The structure of the jet near the point of separation is de scribed by a free interaction in which the fundamental problem is to solve the boundary-layer equations in a viscous sublayer close to the wall. Analy tical and numerical solutions are found for the thermal field within the su blayer for the case of a wall at a fixed temperature. In particular, the wa ll heat transfer is obtained and effects of upstream influence within the t hermal field are discussed. The large-Prandtl-number limit is considered in detail and it is shown that the main variation of the thermal field occurs within a region in the immediate neighbourhood of the point of separation. An upstream-downstream iterative method is used to obtain a numerical solu tion for this thermal field.