Euler-Euler Multiphase with LES?

anon_n · October 2, 2009, 06:14

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

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?

October 2, 2009, 06:14	Euler-Euler Multiphase with LES?	#1
anon_n Disabled Join Date: Mar 2009 Posts: 11 Rep Power: 17	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.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Euler granular multiphase	ida	FLUENT	7	October 7, 2013 14:09
CFX 11 Scheme for LES in Multiphase	Man	CFX	12	May 25, 2009 20:26
LES for multiphase simulation	Kushagra	CFX	0	April 24, 2008 19:51
Multiphase Euler Granular Parameter	Javier	FLUENT	1	June 1, 2007 06:29
LES in multiphase flows	ap	FLUENT	0	December 13, 2003 08:07

October 6, 2009, 03:31		#3
anon_n Disabled Join Date: Mar 2009 Posts: 11 Rep Power: 17	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?