|February 8, 2011, 07:37||
Help with pimpleFoam
Join Date: Sep 2010
Location: Santiago, Chile
Posts: 7Rep Power: 8
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!
|groovybc, pimplefoam, pulsatile|
|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|
|tried with pimpleFoam and a big CFL = 5||ivan_cozza||OpenFOAM Running, Solving & CFD||9||June 4, 2013 18:14|
|PimpleFoam problem||Vadims.geza||OpenFOAM||8||December 7, 2011 09:54|