Alternate interpretation of the subgrid scale eddy viscosity
It is shown that the subgrid scale (SGS) eddy viscosity for numerical calculations of turbulent flow has the effect of artificially enlarging the Kolmogorov microscale until it becomes comparable to the finite-difference mesh spacing. The SGS eddy viscosity is therefore closely analogous to the von Neumann--Richtmyer artificial viscosity for shock waves.
- Research Organization:
- Los Alamos Scientific Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6133629
- Report Number(s):
- LA-7955-MS
- Country of Publication:
- United States
- Language:
- English
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