two fluids in CFX-pre

bond · December 30, 2009, 05:27

pls tell me, how can i assign two different fluids in CFX-Pre seperately for two domains. like water and oil. water domain and oil domains are seperate with seperate inlet and outlets......????

Abou ali · December 31, 2009, 04:08

Hi,
The easiest method to use different fluids in different domains is by enabling the Beta features of CFX.
In the CFX-Pre window go to Edit/Options, in the options table select CFX-Pre and activate Enable Beta Features and click Ok.
Now go to the simulation tree and right click on Simulation then disable Constant Domain Physics. Finally you can select the desired fluid for each domain.

pantarei83 · January 5, 2010, 12:08

I have the same problem, but in my CFX version 10.0 I can't find these commands.
Help me!

stumpy · January 6, 2010, 15:29

In older versions you need to set the environment variable "CFX5_NO_CONSTANT_PHYSICS = T"

pantarei83 · January 7, 2010, 04:42

Hi Stumpy,
I'm new to CFX. Can you tell me hot to set the environment variable "CFX5_NO_CONSTANT_PHYSICS = T"?
Thanks a lot

shogologo · January 7, 2010, 09:26

Click on "START" then Settings then open Control Panel
Click the System icon
Go to the Advanced panel
Click the Environment Variables button
Select the "new" button to create a new environment variable
The value of "VARIABLE NAME " should be

CFX5_NO_CONSTANT_PHYSICS
7. The value of "VARIABLE VALUE" should be

T
Click on "OK" then Restart system

pantarei83 · January 7, 2010, 11:37

Thank a lot...

makkks · July 21, 2011, 02:45

HI everyone,

I have a similar problem.
I have two fluids: air and oil
As discussed above I activated Enable Beta Features and disabled Constant Domain Physics.
It changed at first but when I closed and reopened the simulation again, its not working.
I checked options again but it is set to enable beta and disable physics now.
I m not able to get different fluid in different domain.
Plz help

ps: m working on (Ansys 13,windows server2008)

wenwen · November 30, 2013, 14:16

Quote:

Originally Posted by makkks

HI everyone,

I have a similar problem.
I have two fluids: air and oil
As discussed above I activated Enable Beta Features and disabled Constant Domain Physics.
It changed at first but when I closed and reopened the simulation again, its not working.
I checked options again but it is set to enable beta and disable physics now.
I m not able to get different fluid in different domain.
Plz help

ps: m working on (Ansys 13,windows server2008)

Not only disable constant domain in edit/option
but also disable it in outline/case option/general

soumitra2102 · August 26, 2018, 17:19

Quote:

Originally Posted by wenwen

Not only disable constant domain in edit/option
but also disable it in outline/case option/general

had the same problem;
Thanks it worked.

December 30, 2009, 05:27	two fluids in CFX-pre	#1
bond New Member Join Date: Dec 2009 Posts: 2 Rep Power: 0	pls tell me, how can i assign two different fluids in CFX-Pre seperately for two domains. like water and oil. water domain and oil domains are seperate with seperate inlet and outlets......????

December 31, 2009, 04:08	CFX Beta Features	#2
Abou ali Member Join Date: Nov 2009 Posts: 49 Rep Power: 17	Hi, The easiest method to use different fluids in different domains is by enabling the Beta features of CFX. In the CFX-Pre window go to Edit/Options, in the options table select CFX-Pre and activate Enable Beta Features and click Ok. Now go to the simulation tree and right click on Simulation then disable Constant Domain Physics. Finally you can select the desired fluid for each domain. farzadpourfattah and haytam14 like this.

January 7, 2010, 09:26		#6
shogologo New Member Join Date: May 2009 Posts: 17 Rep Power: 17	Click on "START" then Settings then open Control Panel Click the System icon Go to the Advanced panel Click the Environment Variables button Select the "new" button to create a new environment variable The value of "VARIABLE NAME " should be CFX5_NO_CONSTANT_PHYSICS 7. The value of "VARIABLE VALUE" should be T Click on "OK" then Restart system

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January 5, 2010, 12:08		#3
pantarei83 New Member Antonio P. Join Date: Mar 2009 Posts: 10 Rep Power: 17	I have the same problem, but in my CFX version 10.0 I can't find these commands. Help me!

January 6, 2010, 15:29		#4
stumpy Senior Member Join Date: Apr 2009 Posts: 531 Rep Power: 21	In older versions you need to set the environment variable "CFX5_NO_CONSTANT_PHYSICS = T"

January 7, 2010, 04:42		#5
pantarei83 New Member Antonio P. Join Date: Mar 2009 Posts: 10 Rep Power: 17	Hi Stumpy, I'm new to CFX. Can you tell me hot to set the environment variable "CFX5_NO_CONSTANT_PHYSICS = T"? Thanks a lot

January 7, 2010, 11:37		#7
pantarei83 New Member Antonio P. Join Date: Mar 2009 Posts: 10 Rep Power: 17	Thank a lot...

July 21, 2011, 02:45		#8
makkks New Member Mridul Join Date: Apr 2011 Location: Melbourne, Australia Posts: 26 Rep Power: 15	HI everyone, I have a similar problem. I have two fluids: air and oil As discussed above I activated Enable Beta Features and disabled Constant Domain Physics. It changed at first but when I closed and reopened the simulation again, its not working. I checked options again but it is set to enable beta and disable physics now. I m not able to get different fluid in different domain. Plz help ps: m working on (Ansys 13,windows server2008)