2007 # A dynamic global-coefficient subgrid-scale eddy-viscosity model for large-eddy simulation in complex geometries

**Abstract:** An improvement of the dynamic procedure of Park et al. [Phys. Fluids 18, 125109 (2006)] for closure of the subgrid-scale eddy-viscosity model developed by Vreman [Phys. Fluids 16, 3670 (2004)] is proposed. The model coefficient which is globally constant in space but varies in time is dynamically determined assuming the “global equilibrium” between the subgrid-scale dissipation and the viscous dissipation of which utilization was proposed by Park et al. Like the Vreman model with a fixed coefficient and the dy…

Help me understand this report

Search citation statements

Paper Sections

Select...

2

1

1

1

Citation Types

2

76

0

Year Published

2011

2024

Publication Types

Select...

4

3

Relationship

0

7

Authors

Journals

(78 citation statements)

2

76

0

“…The filtered strain rate tensor isS i j . The eddy-viscosity coefficient ν t is calculated from the global coefficient dynamic Vremen's SGS model [14], which will be introduced below.…”

confidence: 99%

“…The filtered strain rate tensor isS i j . The eddy-viscosity coefficient ν t is calculated from the global coefficient dynamic Vremen's SGS model [14], which will be introduced below.…”

confidence: 99%

“…Incorrectly large dissipation of a SGS model can enlarge the separation zone artificially in the mean velocity profiles, whereas improper small dissipation may erroneously shorten it. In the work by You and Moin [14], a dynamic procedure was proposed to determine the global coefficient in Vreman's model [13]. In the Vreman SGS model, the eddy-viscosity coefficient ν t is calculated by using…”

confidence: 99%

“…For the sake of clarity, sometimes the invariant Q Ω is also used. Notice that it can always be written in terms of Q S , Q G via identity (7). Starting from the classical Smagorinsky model, they are presented in chronological order.…”

confidence: 99%

“…More recently, Park et al 6 introduced two global dynamic approaches: a dynamic global model based on the Germano identity and a dynamic global model with two test filters based on the global equilibrium between the viscous dissipation and the SGS dissipation. Instead of using two test filters, You and Moin 7 presented a dynamic global approach using only one test filter. However, Lee et al 8 showed that the assumption of the global equilibrium is not valid for freely decaying isotropic turbulence.…”

confidence: 99%