Author(s)

M. Winkelstrater, H. Laschefski, G. Heiderich & N.K. Mitra

Abstract

Numerical simulations of flow and heat transfer of rectangular impinging jets in rows M. Winkelstrater, H. Laschefski, G. Heiderich & N.K. Mitra Institut fur Thermo- und Fluiddynamik, Ruhr-Universitat Bochum, D-44780 Bochum, Germany ABSTRACT Flow and heat transfer of rows of laminar rectangular impinging jets have been determined from the numerical solution of Navier-Stokes and energy-equations. The jets are in-line (ie. discharging axially) or radial (ie. discharging from the sides). Results show that depending on the Reynolds number and the geometry, the jet interaction can cause flow separation and vortices. With increasing Reynolds number the flow becomes periodic and eventually chaotic. INTRODUCTION Impinging jets are used for heating, cooling or drying of surfaces. They find applications in paper, glass or textile industries and electronic cooling. These jets discharge from round or rectangular slots. They can be axial or radial. An axial jet produces large transfer

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