[Hotjuan]

Hi,

i'm working scalarTransportFoam trying to get temperature distribution on a wall with internal heat generation (q=1000kW/m3), one face with 100ºC and another with 200ºC imposed.

My problem's with fvOptions. How can i add the internal heat generation source term in fvOptions? Anyone made something similar?

Thank you and best regards

[zfaraday]

I'm also interested in the answer! I'm working with something similar but I haven't found the way to solve it...

Thanks in advance!

[olivierG]

hello,

I think there is not such ready to use fvOption source for heat generation (i.e W or W/m3 source). You can have it for T, but this is [K], not Watt. You also can constraint T value, but not the heat source directly.
So the solution is to use the "codedSource" ... but this need a little codding stuf.

regards,
olivier

[zfaraday]

Yes, you are right. But as heat flows through a solid according to the expression

q/A = -k*dT/dx

maybe we could do something with the gradT. That's what I first thought... Maybe working with swak4foam...

[lavdwall]

Can someone give me an example of the usage of codedSource in fvOptions? What exactly are codeCorrect, codeAddSup and codeSetValue?

[Hotjuan]

Hi,

to solve this problem, i used fvOptions with scalarSemiImplicitSource.
Where the Su term (first one) is the internal heat transfer and thats solved!

Source
{
    type            scalarSemiImplicitSource;
    active          true;
    selectionMode   all;

    scalarSemiImplicitSourceCoeffs
    {
        volumeMode     specific;
        injectionRateSuSp
        {
             T       (0 0); 
        }
    }
}

Best regards.