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March 23, 2015, 04:14 |
Force magnitude with moving mesh
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Member
daniel fernex
Join Date: Oct 2014
Location: Braunschweig, Germany
Posts: 36
Rep Power: 11 |
Dear all,
I have further questions concerning the forces calculation with moving mesh. I'm simulating a rotating wind turbine. My problem is that the resulting forces seem to be too high (I have a wind turbine with power coefficient much higher than 1...). I was thinking maybe I had something wrong with my simulation, so I tried to run a simple 2D case of a cylinder with basically the same pre-processing data (cell size, boundary conditions, solver (pimpleFoam)). And I ended up with perfect values : I have a Cd error of 2%. So the simulation parameters seem to be in order. To sum up, I have run the following simulations with the same input parameters (the main difference is the moving mesh) :
Therefore the error seems to be coming from the moving mesh. So my question is : does anyone have experienced wrong forces calculations because of a moving mesh ? Or does anyone have experienced right forces calculations ? Should I trust my results and look somewhere else for the error (even though I've looked into almost everything else...) ? I would be glad if anyone having computed forces from a moving mesh could give their feedback (no matter wether it's positive or negative, I'd like to make myself an opinion on how confident I should be with my results) ! Thank you in advance for any answer! Daniel PS :
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