A NOTE ON THE PRANDTL NUMBER EFFECT ON LAMINAR HEAT-TRANSFER AND RECOVERY

A critical revision is made of the classic power-law expressions that describe the effect of the Prandtl number on laminar heat transfer and temperature recovery for Pr near one, by applying a perturbation anal ysis to the energy equation for constant-property flow. In this way, t he Pr dependence is obtained as-a systematic asymptotic expansion up t o any desired order, which provides a more accurate and convenient pro cedure than classic curve-fitting methods. The effect of pressure grad ient and flow sweep are examined for self-similar yawed wedge flows.