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On predicting the turbulence-induced secondary flows using nonlinear k-ε models (1996)

Mompean, G. ; Gavrilakis, S. ; Machiels, L. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Physics of Fluids 8 (1996), S. 1856-1868

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ISSN: 1089-7666

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Low turbulent Reynolds number direct simulation data are used to calculate the invariants of the Reynolds stress and the turbulent dissipation rate in a square duct. The results show that, depending on the region where the analysis is carried out, the turbulent flow field comes close to one-, two-, and three-component states. Modeling such flows—even at higher Reynolds numbers—will require models that can approach all three states. A number of related nonlinear k-ε models are tested a priori using the direct simulation data. The numerical simulation using Reynolds averaged Navier–Stokes equations with these models was performed. Their ability to predict the secondary flows, with a low-Reynolds k-ε model, cannot be gauged from realizability. © 1996 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.868968

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