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Smagorinsky Sub-grid Model

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Old   September 15, 2004, 23:50
Default Smagorinsky Sub-grid Model
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Craig Johansen
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The Smagorinsky subgrid model calculates the sub-grid stress based upon an eddy viscosity. The eddy viscosity is calculated from a length and velocity scale. The length scale is the grid size and the velocity scale is defined as the grid size*S where S is the resolved strain rate. My question is, IS THIS RESOLVED STRAIN RATE AN INSTANTANEOUS VALUE (IN TIME) OR IS IT AN AVERAGE VALUE IN TIME. Thanks

Craig
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Old   October 13, 2004, 03:10
Default Re: Smagorinsky Sub-grid Model
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kowsik
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It is the instantaneous value (in time).

Kowsik
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