|April 1, 2013, 15:41||
VAWT using AMI very high courant number or very small time step
Join Date: Feb 2013
Posts: 15Rep Power: 6
I am trying to set up a simulation for a VAWT in OpenFOAM. I can simulate it well in fluent,but I need more computational power. I am currently trying to use OpenFoam in order to be able to use a cluster. At the moment I am trying to simulate a 2D VAWT inside a wind tunnel, so later i can do a 3D in a much more refined mesh.
My OpenFoam version is 2.1.1
I am currently trying a laminar case using cyclicAMI for my sliding interfaces. But after few times steps, the courant number start to go very very high and then the simulation crashes. If i limit the courant number, it will adjust the time step for something very very small which would take forever to compute.
Any help would be appreciated.
case file in following link:
|April 2, 2013, 06:45||
Håkon Bartnes Line
Join Date: Mar 2013
Posts: 27Rep Power: 5
Did you remember to split the baffles between the two cell zones?
I think the command is "createOrSplitBaffles -split -overwrite", but you can find it in the file called "Allrun.pre" in the pimpleDyMFoam/propeller tutorial.
|ami, openfoam, vawt|
|Thread||Thread Starter||Forum||Replies||Last Post|
|alphaEqn.H in twoPhaseEulerFoam||cheng1988sjtu||OpenFOAM Bugs||15||May 1, 2016 16:12|
|How to write k and epsilon before the abnormal end||xiuying||OpenFOAM Running, Solving & CFD||8||August 27, 2013 15:33|
|same geometry,structured and unstructured mesh,different behaviour.||sharonyue||OpenFOAM Running, Solving & CFD||13||January 2, 2013 23:40|
|Very high courant number, time step continuity errors and bounding epsilon||erncyc||OpenFOAM Running, Solving & CFD||1||March 24, 2011 12:00|
|Transient simulation not converging||skabilan||OpenFOAM Running, Solving & CFD||12||September 17, 2007 17:48|