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

Help with pimpleFoam

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 8, 2011, 07:37
Default Help with pimpleFoam
  #1
New Member
 
Francisco Cortťs
Join Date: Sep 2010
Location: Santiago, Chile
Posts: 7
Rep Power: 6
fcortes is on a distinguished road
Hello everyone,

Iím using pimpleFoam to simulate a 3D flow on a very small irregular tube (total volume around 2e-7; 150000 elements (tetrahedral)). Iíve used the files of T-junction tutorial as a base. Iím also using GroovyBC to make the pulsatile velocity with a parabolic profile at the inlet and the pressure at the outlet. Turbulence model is a RAS kOmega and the fluid is Newtonian.

Iíve achieved convergence with pulses with top inlet velocity around 0.6 (Re=450). The minimum time step then was 1.8e-5. The problem is that I canít achieve convergence with higher inlet velocities (Re=650 to 800). Iíve tried a lot of combinations of correctors (1 to 4), nonOrthogonalCorrectors (1 to 4), outerCorrectos (1 to 4), maxCo (1 to 0.5) and relaxation factors (1 to 0.05). I always get a blowout close to the top velocity but sometimes at a velocity lower than the top velocity of the case that worked, which to me is very weird.

If someone knows what I can do to solve this (or needs more info to do so) please let me know.
Thanks in advance!

Francisco
fcortes is offline   Reply With Quote

Old   June 26, 2014, 09:46
Default
  #2
Member
 
Ali reza
Join Date: Mar 2014
Posts: 95
Rep Power: 3
1988 is on a distinguished road
Hello Fransisco
I have ctuck in a problem the same as yours ,did you find an answer?
please help me tanks
1988 is offline   Reply With Quote

Old   June 26, 2014, 11:31
Default
  #3
New Member
 
Francisco Cortťs
Join Date: Sep 2010
Location: Santiago, Chile
Posts: 7
Rep Power: 6
fcortes is on a distinguished road
Nop, I ended up simulating those cases in fluent.
Good luck!
fcortes is offline   Reply With Quote

Reply

Tags
groovybc, pimplefoam, pulsatile

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
Running stably with a large Courant number using pimpleFoam mlawson OpenFOAM 11 November 29, 2014 11:37
Restarting with pimpleFoam deinstein OpenFOAM 9 November 27, 2013 09:53
Problem running IDDES with pimpleFoam charlie OpenFOAM Running, Solving & CFD 7 July 11, 2013 11:45
pimpleFoam help ivan_cozza OpenFOAM Running, Solving & CFD 9 June 4, 2013 18:14
PimpleFoam problem Vadims.geza OpenFOAM 8 December 7, 2011 09:54


All times are GMT -4. The time now is 11:24.