Hello Michal,
I am solving one Impeller case. For me also, Temperature values are not coming properly at outlet. Did you recieve any information from people? If so, Could you please share that information? Regards Prasant. |
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no answer today. M |
hi dear michal.i have had doubt about energy equation ever.but i didn't understand what you have done.did diffuser problems were solved properly at both versions but another problem didn't?both versions gave incorrect results in second experiment or just one did so?
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Hello foamers,
Did you succeed to perform any compressible flow simulation for turbomachinery application? What is you feedback? I have also encoutered some problems you were talking about. This is my case: OpenFOAM-v2006 Geometry: Centrifugal compressor, only one blade passage with cyclic/cyclicAMI (with diffuser vanedless and without volute) BCs: flowRateInletVelocity with fixedValue temperature inlet and fixedValue pressure outlet MRF model Turbulence: kOmegaSST Thermophysical: hePsiThermo, pureMixture, transport const, hConst, perfectGas, sensibleInternalEnergy Tried Solvers: rhoSimpleFoam, rhoCentralFoam, sonicFoam Results are strange, the pressure increased as expected at the exit but not the temperature which seems remain almost constant. Do you have any idea of the problem? |
I kindly suggest you to review the understanding of yours for the problem at hand: I don't see any application that you can subsequently test {rhoSimpleFoam, rhoCentralFoam, sonicFoam} for modelling of the same physical phenomena. Yet note that compressible flow simulations in general are far more sensitive to the numerical settings than its incompressible counterparts.
If the concern of yours is the numerical stability: I suggest you to test these fvOptions: limitTemperature, (if the case is unsteady) limitVelocity, (if the case is steady) velocityDampingConstraint. |
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