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-   -   The difference between Laminar model and DNS at lo (http://www.cfd-online.com/Forums/fluent/35996-difference-between-laminar-model-dns-lo.html)

fpz March 11, 2005 21:22

The difference between Laminar model and DNS at lo
 
Hi,all, I am newer in CFD. Laminar model is preferable when I choose a mathematical model for low Re problem in Fluent(for example, channel flow less than 2000). But I cannot make a differnce betwwen laminar model and DNS at low Re because here laminar model solves the N-S equation directly. Can I say that Laminar model equals to DNS at low Re given that the mesh resolution is suffcient small? Many thanks!

dirk March 13, 2005 18:57

Re: The difference between Laminar model and DNS a
 
You can say that.

fpz March 13, 2005 23:55

Re: The difference between Laminar model and DNS a
 
Thanks. However, if Re is greater than 2000, how about the difference given the mesh resolution is sufficent small? If it is okay, can we say that laminar model equals to DNS?

mateus March 14, 2005 07:33

Re: The difference between Laminar model and DNS a
 
Hi!

Be carefull with the phrase suficient resolution when talking about DNS...That means about 10^10 nodes for Re=2000 (Re^3)...

Otherwise you can say that...

MATEUS


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