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Old   March 6, 2005, 23:02
Default ask help on dynamic model
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tommewang
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can anybody explain dynamic model in simple word? especially the relationship between the test filter and sgs filter, the process of its application. or suggest some references.
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Old   March 9, 2005, 20:34
Default Re: ask help on dynamic model
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agg
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Refer these:

1) A dynamic subgrid scale eddy viscosity model., Germano et al., Physics of fluids A, (3), 1760-1765

2) A proposed modification of the Germano subgrid scale closure method., Lilly, D.K., Physics of fluids A, (4), 633-635.

In simple words, the dynamic model utilizes the resolved velocities of the flow field to come up with a coefficient rather than specify it apriori as in the standard Smagorinsky model. In this way, the method is independent of the geometry and application.
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Old   March 13, 2005, 19:54
Default Re: ask help on dynamic model
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tommewang
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Thank you very much first. In my mind, I think the most important point of Dynamic model is to set up a iterative relationship for the calculation of the model parameter Cd(x,y,z,t)
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Old   March 14, 2005, 20:41
Default Re: ask help on dynamic model
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noName
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The procedure for calculating C is not iterative, but purely algebraic.

The original papers are simple and straight forward (easier than many texts) ... so go through them.
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Old   March 15, 2005, 04:32
Default Re: ask help on dynamic model
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tommewang
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It is iterative in the paper of Poimelli and Liu and one equation model, at least something similar to it.
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