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-   -   Euler-Euler Multiphase with LES? (https://www.cfd-online.com/Forums/main/68808-euler-euler-multiphase-les.html)

anon_n October 2, 2009 06:14
Euler-Euler Multiphase with LES?
 
Hi,

I am kinda confused with the Euler-Euler approach for two-phase (gas-liquid) flow using LES. In the EE-approach, the NS equations are averaged and by applying LES, I filtered the equations again (which is also some sort of averaging). Is this valid? Doesn't it mean that you are averaging an already averaged equation? I hope someone can elaborate on this. Thanks in advance.

christina October 5, 2009 15:21
Quote:
Originally Posted by story (Post 231284)
Hi,

I am kinda confused with the Euler-Euler approach for two-phase (gas-liquid) flow using LES. In the EE-approach, the NS equations are averaged and by applying LES, I filtered the equations again (which is also some sort of averaging). Is this valid? Doesn't it mean that you are averaging an already averaged equation? I hope someone can elaborate on this. Thanks in advance.
Why you consider averaging ?


Will it be possible to consider a different modelling approach!!!

anon_n October 6, 2009 03:31
well... the euler-euler equations are already averaged for use of the k-e model. but some people used LES instead of k-e. but LES is for filtered NS equations. In a single phase flow its no problem. but is this really valid for a two-phase flow?


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