Enhancement of the convective heat transfer for a reciprocating impinging jet flow

The convective heat transferred from the isothermal plate impinged by the jet flow with different reciprocating frequencies are studied computationally. A reciprocating jet impinges on the plate surface is available velocity to remove the heat from the plate surface, it implies that the reciprocating impinging jet is one of the good methods to enhance heat transferred from the plate surface. Results indicate that the local Nusselt number is increasing with the temperature difference ratio R-T, and the local Nusslet number become saturated at R-T=1.0 which means the heat carried out by the jet fluids equal the heat transferred from the plate surface. The average Nusslet number can be increased significatly by using of the nozzle with higher reciprocating frequency, it concluded that the quick recipracting jet flow is effective in the enhancement of the convective heat transfer from the plate surface. (C) 2003 Eisevier Science Ltd.