Compressibility Effectsy in One-Equation Turbulence Models

The one-equation turbulence models by Spalart and Allmaras ( SA ) and Sekundov et al. ( Nut-92 ) are tested against two compressible two-dimensional flows, namely, the turbulent flat-plate boundary layer at zero pressure gradient and the mixing layer. The boundary layer ( BL ) approximation is appli...

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Veröffentlicht in:	Fluid dynamics 2021-09, Vol.56 (5), p.622-629
1. Verfasser:	Kozlov, V. E.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analysis Classical and Continuum Physics Classical Mechanics Compressibility Direct numerical simulation Engineering Fluid Dynamics Fluid- and Aerodynamics Numerical analysis Physics Physics and Astronomy Simulation methods Turbulence Turbulence models Turbulent boundary layer Two dimensional flow
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Beschreibung
Zusammenfassung:	The one-equation turbulence models by Spalart and Allmaras ( SA ) and Sekundov et al. ( Nut-92 ) are tested against two compressible two-dimensional flows, namely, the turbulent flat-plate boundary layer at zero pressure gradient and the mixing layer. The boundary layer ( BL ) approximation is applied to the system of Reynolds equations ( RANS ). The BL results obtained are compared with the available RANS results and the results of direct numerical simulation ( DNS ). The modified Nut-92m model proposed predicts the characteristics of the turbulent flat-plate boundary layer at zero pressure gradient more accurately than the Nut-92 and SA models.
ISSN:	0015-4628 1573-8507
DOI:	10.1134/S0015462821050074