Question to chtMultiRegionFoam

tH3f0rC3 · April 5, 2011, 02:54

Hi,

is it possible to freeze the velocity field as steady-state and solve the heat transfer as transient?

This is what I want to do.
The velocity field is built very fast so that I can say it is steady state. That's because auf high flow rates inside my room.
The heat transfer is slower, thus I have to solve the heat transfer as transient.

Does someone has experience with that?

Best Regards,
tH3f0rC3

Wolle · April 5, 2011, 05:18

Hi!

Have a look here:
http://www.cfd-online.com/Forums/ope...tml#post266001

and especially:
http://www.cfd-online.com/Forums/ope...tml#post266133

Maybe that could help? I just remembered these postings, don't have personal experiences with that...

Ciao
Wolle

tH3f0rC3 · April 5, 2011, 06:59

Thank you for the two links.
I will read thorugh them!

I recieved a private message.
There was the idea to set it up as follows:

I will solve the case with f.ex. simpleFoam, so without heat transfer and steady state, to get the velocity field.
Than start the same case with a heat transfer solver, transient with the starttime = enttime of first case.

I will try! :-)

Best Regards,
tH3f0rC3

April 5, 2011, 02:54	Question to chtMultiRegionFoam	#1
tH3f0rC3 Senior Member Join Date: Mar 2011 Posts: 158 Rep Power: 15	Hi, is it possible to freeze the velocity field as steady-state and solve the heat transfer as transient? This is what I want to do. The velocity field is built very fast so that I can say it is steady state. That's because auf high flow rates inside my room. The heat transfer is slower, thus I have to solve the heat transfer as transient. Does someone has experience with that? Best Regards, tH3f0rC3

April 5, 2011, 05:18		#2
Wolle Member Wolfram Kretzschmar Join Date: Dec 2009 Posts: 71 Rep Power: 16	Hi! Have a look here: http://www.cfd-online.com/Forums/ope...tml#post266001 and especially: http://www.cfd-online.com/Forums/ope...tml#post266133 Maybe that could help? I just remembered these postings, don't have personal experiences with that... Ciao Wolle __________________ CAELinux 2010 -- OpenFOAM 1.7

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April 5, 2011, 06:59		#3
tH3f0rC3 Senior Member Join Date: Mar 2011 Posts: 158 Rep Power: 15	Thank you for the two links. I will read thorugh them! I recieved a private message. There was the idea to set it up as follows: I will solve the case with f.ex. simpleFoam, so without heat transfer and steady state, to get the velocity field. Than start the same case with a heat transfer solver, transient with the starttime = enttime of first case. I will try! :-) Best Regards, tH3f0rC3