CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums

Search Results

Register Blogs Community New Posts Updated Threads Search

Showing results 1 to 7 of 7
Search took 0.00 seconds. Search: Posts Made By: alberto
Forum: OpenFOAM August 7, 2011, 03:29
Replies: 17
Views: 2,871
Posted By alberto
Are you using the same relaxation factors in...

Are you using the same relaxation factors in pimpleFoam and transient SIMPLE?

If the setup is the same, they should give the same result.
Forum: OpenFOAM August 6, 2011, 16:33
Replies: 17
Views: 2,871
Posted By alberto
Were you having problems with pimpleFoam? If yes,...

Were you having problems with pimpleFoam? If yes, what kind of problems? There should be little difference compared to a "transient SIMPLE".
Forum: OpenFOAM August 3, 2011, 11:53
Replies: 17
Views: 2,871
Posted By alberto
Yes, if you perform an unsteady calculation, the...

Yes, if you perform an unsteady calculation, the residuals should go down at each time step, until they reach the specified tolerance.

Residuals clearly won't do that in a steady-state solver,...
Forum: OpenFOAM August 3, 2011, 10:17
Replies: 17
Views: 2,871
Posted By alberto
The residual behaviour seems to show the solution...

The residual behaviour seems to show the solution is oscillating, which might indicate also a problem in the case setup.

However, you are using inconsistent numerical schemes:



...
Forum: OpenFOAM July 30, 2011, 15:32
Replies: 17
Views: 2,871
Posted By alberto
Hi, to answer your question you should know...

Hi,

to answer your question you should know if your system reaches a steady state or not. Since it is intrinsically unsteady, it might never reach one.

Anyway, to use SIMPLE for unsteady...
Forum: OpenFOAM July 30, 2011, 04:34
Replies: 17
Views: 2,871
Posted By alberto
Are you doing sub-interations inside each time...

Are you doing sub-interations inside each time step? You can find it already done in pimpleFoam.

Best,
Forum: OpenFOAM July 30, 2011, 03:21
Replies: 17
Views: 2,871
Posted By alberto
Oscillatory system (=unsteady) in steady state...

Oscillatory system (=unsteady) in steady state solver (simpleFoam)?
Showing results 1 to 7 of 7

 
Forum Jump

All times are GMT -4. The time now is 17:03.

Contact Us - CFD Online - Privacy Statement - Top