Comparison of two-equation model and reynolds stress models with experimental data for the three-dimensional turbulent boundary layer in a 30 degree bend
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The objective of the present study is to investigate the pressure-strain correlation terms of the Reynolds stress models for the three dimensional turbulent boundary layer in a 30° bend tunnel. The numerical results obtained by models of Launder, Reece and Rodi (LRR), Fu and Speziale, Sarkar and Gatski (SSG) for the pressure-strain correlation terms are compared against experimental data and the calculated results from the standard k-ε model. The governing equations are discretized by the finite volume method and SIMPLE algorithm is used to calculate the presure field. The results show that the models of LRR and SSG predict the anisotropy of turbulent structure better than the standard k-ε model. Also, the results obtained from the LRR and SSG models are in better agreement with the experimental data than those of the Fu and standard k-ε models with regard to turbulent normal stresses. Nevertheless, LRR and SSG models do not effectively predict pressure-strain redistribution terms in the inner layer because the pressure-strain terms are based on the locally homogeneous approximation. Therefore, to give better predictions of the pressure-strain terms, non-local effects should be considered.
Key WordsPressure-Strain Correlation Terms Reynolds Stress Model (RSM) Three Dimensional Turbulent Boundary Layer (3DTBL) Anisotropy Turbulent Normal Stress
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- Bradshaw, P. and Terrell, M. G., 1969,The response of a turbulent boundary layer on an infinite swept wing to the sudden removal of pressure gradient, NPL Aero Rep. 1305.Google Scholar
- Flack, K. A., and Johnston, J. P., 1993,The near-wall region of a detaching three-dimensional turbulent boundary layer, Int. Conf. On Near-Wall Turbulent Flow, March 15–18, Tempe, Arizona.Google Scholar
- Fu, S., 1988,Computational modeling of turbulent swirling flows with second-moment closures, Ph. D. Thesis, UMIST, Manchester, England.Google Scholar
- Johnston, J. P., 1970,Measurements in a three-dimensional turbulent boundary layer induced by a swept, forward-facing step, J. Fluids Eng., Vol. 98, pp. 823–844.Google Scholar
- Johnston, J. P., 1994,Near wall flow in a three-dimensional turbulent boundary layer on the end wall of a rectangular bend, AIAA 94-0405.Google Scholar
- Launder, B. E., 1986,Low-Reynolds-number turbulence near walls, Rep., TFD/86/4, Dept. of Mech. Eng., UMIST.Google Scholar
- Lin, C. A., 1990,Three-dimensional computations of injection into swirling cross-flow using second moment closure, Ph. D. Thesis, UMIST, Manchester, England.Google Scholar
- Reynolds, W. C., 1991,Analytical methods in turbulence, ME261B course, Stanford University.Google Scholar
- Rotta, J. C., 1979,A family of turbulence models for three-dimensional boundary layers, In Turbulent Shear Flows I Springer-Verlag, New York, 267–278.Google Scholar
- Schwarz, W. R. and Bradshaw, P., 1992,Three-dimensional turbulent boundary layer in a 30 degree bend: experiment and modeling, Rept. MD-61, Thermosciences Division, Stanford University.Google Scholar
- Wilcox, D. C., 1993,Turbulence Modeling for CFD, DCW Industries Inc., Lacanada California.Google Scholar