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Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

A PRIORI ASSESSMENT OF ALGEBRAIC AND DIFFERENTIAL REYNOLDS-STRESS MODELS USING DNS DATABASE

pages 211-216
DOI: 10.1615/TSFP2.1090
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ABSTRACT

We performed a comparative a priori examination of several algebraic and differential second-moment closure models (ASM and DSM) using the DNS database for three generic flows: fully developed channel flow (Moser et al., 1999), flow in an axially rotating pipe (Eggels et al., 1994 and Orlandi and Ebstein, 1999) and the flow over a backward-facing step (Le et al., 1997). First, the coefficient functions G(i) and the basis tensors in the algebraic expression for the Reynolds-stress tensor, as well as the stress components themselves, were evaluated and compared for several ASMs. Then, the model coefficients of the pressure-strain term in the DSM were deduced from the DNS database, and compared with different model proposals. Last, the term-by-term analysis of the pressure-strain and dissipation correlation for several DSMs were performed.

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