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Near-Wall Formulation of the Partially Averaged Navier-Stokes Turbulence Model

B. Basara ; Sinisa Krajnovic (Institutionen för tillämpad mekanik, Strömningslära) ; S. Girimaji ; Z. Pavlovic
Aiaa Journal (0001-1452). Vol. 49 (2011), 12, p. 2627-2636.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: finite circular-cylinder, large-eddy simulation, flow structure, heat-transfer, meshes, aouat b, 2005, phys fluids, v17, p1, zulj v, 2001, 20012593 aiaa, mirdzic i, 1995, computer methods in applied mechanics and engineering, rmano m, 1992, journal of fluid mechanics, v238, p325



Denna post skapades 2012-01-12. Senast ändrad 2014-09-29.
CPL Pubid: 152582

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära (2005-2017)

Ämnesområden

Teknisk mekanik

Chalmers infrastruktur