Test of Large Eddy Simulation in Complex Flow with High Schmidt Number
Turbulent concentration field with Sc=50 was investigated via large eddy simulation. Dynamic mixed model for the passive scalar was tested in a strong shear layer. Both mean and rms eddy diffusivities were shown to be reduced in the middle of the channel as the Schmidt number becomes large. A sudden increase of SGS turbulent Prandtl number in the vicinity of the wall suggests that more careful choice of filter size is required to capture the subgrid-scale dynamics correctly in this region when analyzing high Schmidt number flow.
KeywordsLarge Eddy Simulation Direct Numerical Simulation Schmidt Number Concentration Field Passive Scalar
Unable to display preview. Download preview PDF.
- 4.Lee, G., Na, Y.: On the Large Eddy Simulation of Temperature Field Using Dynamic Mixed Model in a Turbulent Channel. Trans. KSME B 28(10), 1255–1263 (2004)Google Scholar