[ruedavallejo]

Hi All,

I'm trying to simulate a heat transfer problems using heat transfer coefficients. It seems that the right choice is to use externalWallHeatFluxTemperature BC. I have been trying different solvers for this condition without any success.

Any hint about the right solver for this BC?

Regards

[ruedavallejo]

ok, after some trials it's more or less working.

This bc is for compressible solvers (e.g. buoyantSimpleFoam). A good example to try this BC is the hotRoom tutorial under heatTransfer > buoyantSimpleFoam > hotRoom. Try modifying one of the T boundaries.

The structure is as follows:
{
type externalWallHeatFluxTemperature;
Ta uniform 353;
h uniform 3; //heat transfer coeff.

kappa fluidThermo;
kappaName default;
value uniform 300; // initial temp.
}


however after some iterations I'm getting a fatal error:

--> FOAM FATAL ERROR:
Maximum number of iterations exceeded


From function thermo<Thermo, Type>::T(scalar f, scalar T0, scalar (thermo<Thermo, Type>::*F)(const scalar) const, scalar (thermo<Thermo, Type>::*dFdT)(const scalar) const, scalar (thermo<Thermo, Type>::*limit)(const scalar) const) const
in file /home/opencfd/OpenFOAM/OpenFOAM-2.2.2/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 76.

has anyone tried this BC and overcomed this error? I'll keep working on it and post any advance.

Regards,

[laurentD]

Hi,
i have the same problem.
Moreover, in my results i can see that the temperature has values which are huge like 3e+22 before the job crashes.
Any advance in this problem ?
Best regards,
Laurent