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dieselEngineFoam bug - OpenFOAM-1.6-ext

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Old   July 14, 2013, 11:29
Default dieselEngineFoam bug - OpenFOAM-1.6-ext
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Martin Novák
Join Date: Dec 2012
Location: Prague
Posts: 56
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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
Any ideas, experiences?
I will be glad for any suggestion. This problem drives me crazy


Best Regards

Martin
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File Type: gz dieselEngineFOAM_bug.tar.gz (85.7 KB, 16 views)
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Old   December 5, 2013, 14:18
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Martin Novák
Join Date: Dec 2012
Location: Prague
Posts: 56
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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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bug, diesel engine, engine simulation, extended

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