Title: Jet-cavity interaction: effect of the cavity depth

Authors: Fatima Madi Arous; Amina Mataoui; Abdelali Terfous; Abdellah Ghenaim

Addresses: Theoretical and Applied Fluid Mechanics Laboratory, USTHB of Algiers, P.O. Box 32, El Alia Bab Ezzouar, Algiers 16111, Algeria ' Theoretical and Applied Fluid Mechanics Laboratory, USTHB of Algiers, P.O. Box 32, El Alia Bab Ezzouar, Algiers 16111, Algeria ' Laboratoire de Génie de la Conception, INSA, 24 bd. de la Victoire, 67084 Strasbourg, France ' Laboratoire de Génie de la Conception, INSA, 24 bd. de la Victoire, 67084 Strasbourg, France

Abstract: A two-dimensional turbulent wall jet over a shallow cavity is studied numerically. The present paper investigates the wall jet outer layer effect on a shallow cavity flow structure. This layer is an important turbulence source which is added to that of the inner shear layer. It was found that the reattachment process seems to be accelerated in the turbulent wall jet incoming flow compared to that of the cavity in duct flow. The present study shows that the flow structure is very sensitive to the cavity depth to nozzle height ratio; the increasing of this ratio induces a reattachment length decrease.

Keywords: wall jets; turbulence; fluid–solid interaction; recirculation; reattachment; cavity flow; jet-cavity interaction; cavity depth; nozzle height.

DOI: 10.1504/PCFD.2012.049096

Progress in Computational Fluid Dynamics, An International Journal, 2012 Vol.12 No.5, pp.322 - 332

Available online: 13 Sep 2012 *

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