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Issue related to Constant heat flux Boundary condition |
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March 5, 2021, 03:13 |
Issue related to Constant heat flux Boundary condition
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#1 |
Member
Saurav Kumar
Join Date: Jul 2016
Posts: 80
Rep Power: 9 |
I want to specify constant heat flux Boundary condition as below and i have two questions
1. what are the difference between externalWallHeatFluxTemperature and fixedGradient BC? 2. I am getting some error for below BC Wall { type externalWallHeatFluxTemperature; mode flux; q uniform 1446; // (q = W/m^2) kappaMethod fluidThermo; kappa none; kappaMethod fluidThermo; value $internalField; // type fixedGradient; // gradient uniform 55223; //{ DT/Dn = q (w/m^2) / K_air (W/m-K) = 1446/0.026 = 55223 } } It is showing below error in OF8 "--> FOAM FATAL ERROR: Cannot find a fluidThermo or solidThermo instance From function Foam::tmp<Foam::Field<double> > Foam::temperatureCoupledBase::kappa(const fvPatchScalarField&) const in file derivedFvPatchFields/temperatureCoupledBase/temperatureCoupledBase.C at line 133." FOAM exiting Thanks |
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March 12, 2021, 14:31 |
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#2 |
Member
Fabian Friberg
Join Date: Dec 2020
Posts: 31
Rep Power: 5 |
Maybe it doesn't matter since it should skip the second one, but try removing the duplicate "kappaMethod fluidThermo;" row?
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March 16, 2021, 04:39 |
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#3 |
Senior Member
Join Date: Sep 2013
Posts: 353
Rep Power: 20 |
You might be trying to use it with a solver that is not using solid or fluidThermo.
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