CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   LES or RANS ? (http://www.cfd-online.com/Forums/fluent/45390-les-rans.html)

TC July 13, 2007 11:34

LES or RANS ?
 
I'm trying to model a co-axial flow into a dead end tube.I hope to extract concentration profiles and velocity fields.

1. How do I decide between LES and RANS ?

2. Will my mesh be different for both the cases ?

3.How can I perform time averaging on the .dat files without having to extract specific columns from the file using MATLAB ?

Any tips will be greatly appreciated.

Many thanks !

Joe July 13, 2007 16:16

Re: LES or RANS ?
 
1. Depends on what you are trying to achieve, your computational resources, Reynolds number, ...

2. For true LES, very different. For DES, possibly the same.



All times are GMT -4. The time now is 20:46.