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July 14, 2013, 12:29 |
dieselEngineFoam bug - OpenFOAM-1.6-ext
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#1 |
Member
Martin Novák
Join Date: Dec 2012
Location: Prague
Posts: 70
Rep Power: 13 |
Dear FOAMers,
I have noticed a bug in OpenFOAM-1.6-ext release, that is crucial for my further work in IC-engine simulations. I have combined the aachenBomb with kivaTest in order to create a case for dieselEngineFoam. The case solution can be obtained on static geometry with dieselFoam. However, in the case of dieselEngineFoam it crashes with Code:
From function janafThermo<equationOfState>::checkT(scalar& T) const in file /home/novakm/OpenFOAM/OpenFOAM-1.6-ext/src/thermophysicalModels/specie/lnInclude/janafThermoI.H at line 65 attempt to use janafThermo<equationOfState> out of temperature range 200 -> 5000; T = -100 From function specieThermo<thermo>::T(scalar f, scalar T0, scalar (specieThermo<thermo>::*F)(const scalar) const, scalar (specieThermo<thermo>::*dFdT)(const scalar) const) const in file /home/novakm/OpenFOAM/OpenFOAM-1.6-ext/src/thermophysicalModels/specie/lnInclude/specieThermoI.H at line 73 Maximum number of iterations exceeded. Rescue by HJ Bug seems to be similar to 0000046: dieselFoam probölem with janafThermo http://sourceforge.net/apps/mantisbt...view.php?id=46 Bug reported as https://sourceforge.net/apps/mantisb...iew.php?id=180 The problem is reproducible with Code:
blockMesh dieselEngineFOAM I will be glad for any suggestion. This problem drives me crazy Best Regards Martin |
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December 5, 2013, 14:18 |
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#2 |
Member
Martin Novák
Join Date: Dec 2012
Location: Prague
Posts: 70
Rep Power: 13 |
Oh, my young me was so dumb. This is not a bug. It is connected with time-step in simulation. Too many droplets are moving across a cell and takes energy which results e.g. in negative temperatures. Lowering tim-step solvest the problem.
Martin |
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Tags |
bug, diesel engine, engine simulation, extended |
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