|November 13, 2013, 12:47||
VAWT force difference between blades
Join Date: Mar 2010
Posts: 56Rep Power: 8
I'm running a 2D simulation of a 2 blades VAWT. r.omega/Vinf is set to 5. Turbulence model is k-omega SST, with y+ around 1.
When using a courant number around 50, the simulation runs fine and the forces and flowfield for both blades are identical.
With a courant below 5, the flow field and forces for the two blades are different. This behavior remains when pre-rotating the domain 180° (hence any mesh difference is ruled out). see movie attached.
This does not happen with other turbulence model.
Any hints on the origin of the difference would be appreciated !
I can transfer a minimal test case upon request.
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