Used Heat Flux instead of tempearture
Hi
I am working on multi phase change solver called, reactingTwoPhaseEulerFoam.I have boiling and condensation at boundary. instead of constant temperature at wall, I want to apply heat flux and openFoam automatically calculate wall temperature. The library that I used is called "fixedMultiPhaseHeatFlux, for example when I have boiling, I set this boundary for T.water at wall and for another phase T.steam I applied, "copyFixedValue"(see end of message). My problem is that, when I set heat flux of 2000 W/m2 for wall, when my running is complete, the value of heat flux that I gather from all control volume at wall is not exactly the value that I set as input, it has error of 4-15 %. I want to know anyone has ever worked with library before, what is your experience about this? thanks a lot for your attention ************************************************ \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class volScalarField; location "0"; object T.water; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 0 0 1 0 0 0]; internalField uniform 286.17; boundaryField { evaporatorLiq { type fixedMultiPhaseHeatFlux; relax 0.5; q uniform 2000; phase "liquid"; value uniform 289.6; } *********************************************** FoamFile { version 2.0; format ascii; class volScalarField; location "0"; object T.steam; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 0 0 1 0 0 0]; internalField uniform 286.17; boundaryField { evaporatorLiq { type copiedFixedValue; sourceFieldName T.water; value uniform 289.6; } |
Hey! Have you solve the problem? I met the same question.
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