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Refining Strategy of the Supersonic Turbulent Flow Over a Backward-Facing Step

Published online by Cambridge University Press:  05 May 2011

Shih-Ying Yang
Shih-Ying Yang*
Affiliation:
Department of Aeronautical Engineering, National Huwei Institute of Technology, Huwei, Yunlin, Taiwan 632, R.O.C.
*
*Associate Professor
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Abstract

A modified error indicator is developed to study the supersonic turbulent flow over a backward-facing step. In the Cartesian coordinate system, the unsteady Navier-Stokes equations with a low-Reynolds-number k−ε turbulence model are solved. The modified error indicator, in which the unified magnitude of substantial derivative of pressure and unified magnitude of substantial derivative of weighted vorticity magnitude are incorporated, is applied to treat the mesh refining. To assess the present approach, the transonic turbulent flow around an NACA 0012 airfoil is performed. Based on the comparison with the experimental data, the accuracy of the present approach is confirmed. According to the high-resolutional result on the adaptive mesh, the structure of backstep corner vortex, expansion wave and oblique shock wave is distinctly captured.

Keywords

RefiningError indicatorBackward-facing stepTurbulent.
Type
Articles
Information
Journal of Mechanics , Volume 19 , Issue 4 , December 2003 , pp. 397 - 407
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2003

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