Near-Wall Formulation of the Partially Averaged Navier-Stokes Turbulence Model
Journal article, 2011
The variable-resolution partially averaged Navier-Stokes bridging strategy is applied to the four-equation k-epsilon-zeta-f turbulence model. In this approach, the popular two-equation model is enhanced with an additional transport equation for the velocity scale ratio zeta and an equation for the elliptic relaxation function f for the purpose of improved near-wall behavior. By using the elliptic relaxation technique to model the wall blocking effect, the new four-equation partially averaged Navier-Stokes model retains the simplicity of the previous two-equation partially averaged Navier-Stokes versions but significantly improves predictions in the near-wall region. The proposed partially averaged Navier-Stokes k-epsilon-zeta-f model is evaluated in a turbulent channel flow and flow around a three-dimensional circular cylinder mounted vertically on a flat plate. The results clearly show benefits of the improved near-wall modeling and extend partially averaged Navier-Stokes applicability to a broader range of smooth bluff-body separated flows.
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Author
B. Basara
AVL List GmbH
Sinisa Krajnovic
Chalmers, Applied Mechanics, Fluid Dynamics
S. Girimaji
Texas A and M University
Z. Pavlovic
AVL List GmbH
AIAA Journal
0001-1452 (ISSN) 1533-385X (eISSN)
Vol. 49 12 2627-2636Subject Categories (SSIF 2011)
Mechanical Engineering
DOI
10.2514/1.j050967