Three-dimensional simulation of laminar rectangular impinging jets, flow structure, and heat transfer

The flow and heat transfer characteristics of impinging laminar jets issuin g from rectangular slots of different aspect ratios have been investigated numerically through the solution of three-dimensional Navier-Stokes and ene rgy equations in steady state. The three-dimensional simulation reveals the existence of pronounced streamwise velocity off-center peaks near the impi ngement plate. Furthermore, the effect of these off-center velocity peaks o n the Nusselt number distribution is also investigated. Interesting three-d imensional flow structures are detected which cannot be predicted by two-di mensional simulations.