CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

starting compressible flow from incompressible flow results

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   November 30, 2012, 14:14
Default starting compressible flow from incompressible flow results
  #1
Senior Member
 
Mihai Pruna
Join Date: Apr 2010
Location: Boston
Posts: 190
Blog Entries: 1
Rep Power: 7
mihaipruna is on a distinguished road
Since my compressible solution always blows up (internal flow, subsonic, rhoSimplecFoam), and I am able to get some results running an incompressible solver (simpleFoam) , is there a way to start your solution for the compressible solver based on the pressure and velocity obtained after a certain number of iterations with the incompressible solver?
mihaipruna is offline   Reply With Quote

Old   November 30, 2012, 17:56
Default
  #2
Senior Member
 
Lieven
Join Date: Dec 2011
Location: Mol, Belgium
Posts: 295
Rep Power: 13
Lieven will become famous soon enough
If the mesh and boundary conditions are exactly the same, you can simply copy the U and p from he simpleFoam simulation to the 0-folder of the compressible case.

If the mesh is not the same, you can have a look at mapFields (http://www.openfoam.org/docs/user/mapFields.php ).

Regards,

L
Lieven is offline   Reply With Quote

Old   December 3, 2012, 11:02
Default
  #3
Senior Member
 
Mihai Pruna
Join Date: Apr 2010
Location: Boston
Posts: 190
Blog Entries: 1
Rep Power: 7
mihaipruna is on a distinguished road
hi Lieven
Thanks for the response. For the incompressible solver, the pressure is normalized by rho. For the incompressible solver, you set the pressure in its real units.
Any way to get around this when reusing that field?
mihaipruna is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Compressible de Laval Nozzle Flow rw511 CFX 3 May 22, 2011 19:48
Incompressible, Unsteady Cylinder Flow startingcfd Main CFD Forum 1 March 15, 2011 02:12
Natural Convection using Compressible Flow (chtMultiRegionFOAM) msarkar OpenFOAM 2 September 7, 2010 00:13
flow simulation across a small fan jane luo Main CFD Forum 15 April 12, 2004 17:49
momentum under-relaxation for compressible flow with SIMPLE Mihai ARGHIR Main CFD Forum 0 April 7, 2000 04:58


All times are GMT -4. The time now is 04:46.