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ChtmultiRegionSimpleFoam: Run crashed when velocity is high

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Old   May 3, 2016, 13:32
Default ChtmultiRegionSimpleFoam: Run crashed when velocity is high
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Hy everyone,

I'm using OF 2.3.1 to perform some heat transfer calculations in high velocity conditions. I try to perform a canonical case based on a 2D turbulent flow on a 2D plate. I used chtMultiRegionSimpleFoam to perform this simulation but when the velocity is greater than 20m/s, the solver crashes.
I can see some "pressure bumps" within the domain coming from the outlet where a zeroGradient BC is used on the velocity field and a fixedValue BC is used to impose the pressure.
I removed turbulence modeling (KOmegaSST), temperature gradient through the plate (isothermal case), symmetry patch on the top of the numerical domain without any changes.
Do you have any ideas to solve this problem ?
I'm coming from the LES community and this is my first steady simulation .

Thanks a lot

Thomas
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chtmultiregionsimplefoam, heat and mass transfer, openfoam

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