how to use the different turbulance model in one case?

GJ_hit · March 31, 2013, 10:31

Hello everyone
I want to use the different turbulance in one case , before the transistion point,I want to use the laminar model ,after that use turbulace model.
once i saw someone do like this. Do i need use the UDF? Which macro should i use?

thank you for your attention! Need your help.

Ebrahim · March 31, 2013, 11:12

Hi
You can divide your domain to 2 separate part. These parts are separated at the transition point. In the viscous model panel, choose the appropriate turbulence model. Then in the boundary condition panel, where you have 2 fluid zones choose the one that you want to be treated as a laminar zone. In the related panel just check (activate) the "laminar zone" option.
Wish it can help you
Ebrahim

March 31, 2013, 10:31	how to use the different turbulance model in one case?	#1
GJ_hit New Member Join Date: Mar 2013 Posts: 10 Rep Power: 13	Hello everyone I want to use the different turbulance in one case , before the transistion point,I want to use the laminar model ,after that use turbulace model. once i saw someone do like this. Do i need use the UDF? Which macro should i use? thank you for your attention! Need your help.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Use of k-epsilon and k-omega Models	Jade M	Main CFD Forum	40	January 27, 2023 07:18
Error finding variable "THERMX"	sunilpatil	CFX	8	April 26, 2013 07:00
Best turbulance model for analysis	addy01	Main CFD Forum	4	March 31, 2013 14:04
RSM viscous model in bifurcator case	Dim	FLUENT	1	August 23, 2007 12:55
Launder & Sharma model in combusion case	Richard Carroni	Main CFD Forum	1	November 17, 1998 18:59

March 31, 2013, 11:12		#2
Ebrahim New Member Ebrahim Join Date: Mar 2010 Posts: 28 Rep Power: 16	Hi You can divide your domain to 2 separate part. These parts are separated at the transition point. In the viscous model panel, choose the appropriate turbulence model. Then in the boundary condition panel, where you have 2 fluid zones choose the one that you want to be treated as a laminar zone. In the related panel just check (activate) the "laminar zone" option. Wish it can help you Ebrahim