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Strange/unphysical results with any ddtSchemes other than steadyState |
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August 7, 2014, 12:14 |
Strange/unphysical results with any ddtSchemes other than steadyState
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#1 |
New Member
Michael D.
Join Date: Jun 2014
Posts: 14
Rep Power: 11 |
Hi everyone,
I'm relatively new to openFoam and CFD in general, so I'm using a crossflow cylinder simulation as an introduction/validation case, by creating my own mesh and modifying the motorcycle tutorial. So far I've set ddtSchemes to steadyState (in the system/fvSchemes file) to do the simulations, but I'd like to change it and see how/whether it impacts the results. However, using anything other than steadyState causes the simulation behave strangely: After 500 iterations, the pressure and velocity have converged to what looks like the inviscid solution. The other variables are behaving unexpectedly too (see images). I've tried using backward, crankNicholson and euler for ddtSchemes so far. I've tarballed the case where I used euler and included the final output file: https://drive.google.com/file/d/0ByI...it?usp=sharing (system and 0 file also uploaded in their own tarball): https://drive.google.com/file/d/0ByI...it?usp=sharing What am I missing? Any help is appreciated. |
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