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A Modified Dissipation Equation for Reynolds Stress Turbulent Mixing Models
Journal of Fluids Engineering, 2022Abstract A simple modification of the dissipation equation is proposed for augmented Reynolds stress models (RSM) devoted to the prediction of buoyancy-driven turbulent mixing at interfaces. It is based on the partition of the kinetic energy into a “directed” large-scale part related to the turbulence mass flux and a “nondirected” small ...
Jérôme Griffond +2 more
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Modeling of the Reynolds Stress Transport Equation
AIAA Journal, 1997An empirical strategy for improving modeling of the energy dissipation rate e ij and the velocity-pressure gradient Π ij terms in the transport equations for the Reynolds stresses is proposed on the basis of available direct numerical simulations of the turbulent boundary layer and fully developed turbulent channel flow.
Djenidi, L., Antonia, R. A.
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Modified Reynolds equation for coupled stress fluids ? a porous media model
Acta Mechanica, 2004zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Li, W.-L., Chu, H.-M.
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Assessment of Reynolds stress predictions by two-equation turbulence models
15th AIAA Computational Fluid Dynamics Conference, 2001In this paper, we evaluate the k — e and k — u turbulence models in terms of their accuracy in predicting the Reynolds shear stress in equilibrium boundary layers under arbitrary streamwise pressure gradients. The models are tested against the theoretical formulation of Perry et al.
Krishnendu Sinha +2 more
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Near-wall two-equation and Reynolds-stress modeling of backstep flow
International Journal of Engineering Science, 1998Abstract Most near-wall two-equation turbulence models fail to predict the wall shear stress along the step wall of a plane backstep flow and the error could become very large downstream of the reattachment point. This failure was usually attributed to the use of an eddy viscosity damping function that depends on the wall friction velocity and the ...
R.M.C. So, S.P. Yuan
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Closure of the Two-Point Correlation Equation as a Basis for Reynolds Stress Models
Applied Scientific Research, 1993A closure model for the von Kármán-Howarth equation is introduced. The model holds for a wide range of well accepted turbulence theories for homogeneous isotropic turbulence, as there are Kolmogorov's first and second similarity hypotheses and the invariant theory, which is a generalization of Lojtsyanskij's and Birkhoff's integrals.
Oberlack, M., Peters, N.
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The Reynolds stress transport equations in a momentumless wake - Experiments and models
Fluid Dynamics Conference, 1996The determination of the transfer terms in the Reynolds stress transport equations is an important issue in the improvement of closure models in turbulence. A part of these efforts is to provide accurate experimental information on each term of these equations and, particularly, on the pressure-strain term.
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Assessment of g-Equation Formulation for a Second-Moment Reynolds Stress Turbulence Model (Invited)
22nd AIAA Computational Fluid Dynamics Conference, 2015In this work, an alternative formulation for the specific dissipation rate in the Speziale-Sarkar-Gatski / Launder-Reece-Rodi Reynolds stress model is assessed. Here, g=1/omega) is considered as an alternative for ! and the performance of the g-equation is assessed for a range of test cases, which include validation test cases to flows around industry ...
Togiti, Vamshi, Eisfeld, Bernhard
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On the mathematical modeling of the Reynolds stress's equations
28th Aerospace Sciences Meeting, 1990By considering the Reynolds stress equations as a possible descriptor of complex turbulent fields, pressure-velocity interaction and turbulence dissipation are studied as two of the main physical contributions to Reynolds stress balancing in turbulent flow fields.
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