Numerical investigation of flow structure and mixed convection heat transfer of impinging radial and axial jets

Potthast, F. ; Laschefski, H. ; Mitra, N. K. ; Biswas, G. (1994) Numerical investigation of flow structure and mixed convection heat transfer of impinging radial and axial jets Numerical Heat Transfer, Part A: Applications, 26 (2). pp. 123-140. ISSN 1040-7782

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Official URL: http://www.tandfonline.com/doi/abs/10.1080/1040778...

Related URL: http://dx.doi.org/10.1080/10407789408955984

Abstract

Mixed convection flow fields and heat transfer of partially enclosed axial and radial laminar jets impinging on a heated flat plate have been investigated from the numerical solution of incompressible unsteady Navier-Stokes and energy equations with a Boussinesq approximation. For mixed convection flow at Re=200, steady flow has not been observed for either the radial or the axial jet. For the smallest Crashof number (Gr=10,000), periodic solutions have been obtained. With Gr=40,000, nonsteady nonperiodic (chaotic) flow appears. Free convection may increase the heat transfer by more than 200 %.

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