[dmaz]

I'm running a compressible simulation of an airplane with OpenFoam 2.3.0.
The simulation is a steadyState and the turbulence model I have to use is k-omega SST.
The domain is composed by an inlet, an outlet, some walls for the airplane and symmetry conditions in the other faces.
I have semplified it and I'm using a laminar model for the first iterations.
When the simulation starts, the pressure and velocities in some points go to a very high values and then after about 100 iterations the simulation blow up.
The points where the instability starts are locaded in the boundary layer, where the wall of airplane meet the symmetry plane that limits the domain.
I have limited the temperature valuesto a fixed value usning the file fvOptions, set the nonOrthogonalCorrectors from 0 to 4 and the rel toll of p and U to 0.01. This improved a bit the simulation but It is not stable yet.

the Boundary conditions I'm using:
U pressureInletVelocity pressureInletOutletVelocity
p totalPressure fixedValue
T totalTemperature inletOutletTotalTemeprature

What can be the origin of the problem?
I attach some immages of the problematic zones.
thanks in advance,
Dmaz


https://drive.google.com/file/d/0BxI...ew?usp=sharing

https://drive.google.com/file/d/0BxI...ew?usp=sharing

https://drive.google.com/file/d/0BxI...ew?usp=sharing

[Kijung]

Hi,
I recommend to you cellLimited grad scheme

Thanks

[MedinC]

Hi,
Have you solve this problem yet? I'm having a similar problem when running a DLR-F6 at M0.78.
looking forward to your reply

[Carlo_P]

Hey,

you can also bound the pressure in the fvSolution.
Depending of the version can be:
pMinFactor value;
pMaxFactor value;


or
pMin value;
pMax value;