Discontinuity at water level in stratified 2 phase flow

ghorrocks · June 13, 2012, 08:15

Simply go to the domain tab and define an initial condition. Or use the global initialisation tab.

If you just want to quickly evolve the flow to a pseudo-steady state flow then use your best steady state run as an intial condition.

kbaker · June 13, 2012, 08:33

I not understand how to set an initial condition for the domain? I went to default domain then activate initialisation but still get the same warning?

ghorrocks · June 13, 2012, 08:36

Have a look at some of the CFX tutorials which cover a transient simulation. See how they set up the initial conditions.

kbaker · June 13, 2012, 08:52

well if you read the warning message it as below:
Transient analyses require that initial conditions are specified unless an Initial Values file is specified at run-time
I am wondered where the initial values file I did not create any values file during the simulation? I also create an intermediate file for the results from output control but warning still exist and the run cannot start?

kbaker · June 14, 2012, 07:37

In order I transform the problem to unsteady I aware that I need to transform the analysis type to transient? Is there any steps I need to follow before applying the previous step? I check all the steps in transient tutorials nothing mentioned and I never apply it but I still cannot run my case file and the previous warning message still exist?

June 13, 2012, 08:52		#24
kbaker Senior Member Khalid Baker Join Date: Mar 2009 Location: IRAQ Posts: 168 Rep Power: 17	well if you read the warning message it as below: Transient analyses require that initial conditions are specified unless an Initial Values file is specified at run-time I am wondered where the initial values file I did not create any values file during the simulation? I also create an intermediate file for the results from output control but warning still exist and the run cannot start? Last edited by kbaker; June 13, 2012 at 09:13.

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June 13, 2012, 08:15		#21
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Simply go to the domain tab and define an initial condition. Or use the global initialisation tab. If you just want to quickly evolve the flow to a pseudo-steady state flow then use your best steady state run as an intial condition.

June 13, 2012, 08:33		#22
kbaker Senior Member Khalid Baker Join Date: Mar 2009 Location: IRAQ Posts: 168 Rep Power: 17	I not understand how to set an initial condition for the domain? I went to default domain then activate initialisation but still get the same warning?

June 13, 2012, 08:36		#23
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Have a look at some of the CFX tutorials which cover a transient simulation. See how they set up the initial conditions.

June 14, 2012, 07:37		#25
kbaker Senior Member Khalid Baker Join Date: Mar 2009 Location: IRAQ Posts: 168 Rep Power: 17	In order I transform the problem to unsteady I aware that I need to transform the analysis type to transient? Is there any steps I need to follow before applying the previous step? I check all the steps in transient tutorials nothing mentioned and I never apply it but I still cannot run my case file and the previous warning message still exist?