한국전산유체공학회:학술대회논문집
- 한국전산유체공학회 2003년도 The Fifth Asian Computational Fluid Dynamics Conference
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- Pages.105-106
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- 2003
On the Spectral Eddy Viscosity in Isotropic Turbulence
- Park Noma (Seoul National University) ;
- Yoo Jung Yu (Seoul National University) ;
- Choi Haecheon (Seoul National University)
- 발행 : 2003.10.01
초록
The spectral eddy viscosity model is investigated through the large eddy simulation of the decaying and forced isotropic turbulence. It is shown that the widely accepted 'plateau and cusp' model overpredicts resolved kinetic energy due to the amplification of energy at intermediate wavenumbers. Whereas, the simple plateau model reproduces a correct energy spectrum. This result overshadows a priori tests based on the filtered DNS or experimental data. An alternative method for the validation of subgrid-scale model is discussed.