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No heat transfer across interface for CHT

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Old   October 7, 2017, 16:25
Default No heat transfer across interface for CHT
  #1
vs1
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vaibhav
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Hello,

I am using OF4.0, Why no heat transfer occuring through the interface ?

I am using this bc:-

f1_to_s3
{
type compressible::turbulentTemperatureCoupledBaffleMix ed;
refValue uniform 300;
refGradient uniform 0;
valueFraction uniform 1;
value uniform 300;
Tnbr T;
thicknessLayers 0();
kappaLayers 0();
kappaMethod solidThermo;
kappa none;
}
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Old   October 8, 2017, 14:41
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M. C.
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Hi,

I think the reason is that you set:

Code:
kappaLayers     0();
try to comment it out as for 0 value you're setting an "adiabatic" layer to interface as you're telling to the solver that thermal conductivity for that specific layer is 0.

The strange thing is that with
Code:
thicknessLayers 0();
the solver should skip kappaLayers value...

Hope this helps.

Regards.

PS:In any case, if you can, I truly suggest to upgrade to OF5.x-dev
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Old   October 13, 2017, 05:55
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Marc
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Quote:
Originally Posted by student666 View Post
PS:In any case, if you can, I truly suggest to upgrade to OF5.x-dev
I'm curious, why do you say so? I'm currently using cht solvers in OF4.1 because it is the version installed in my local cluster but maybe if OF5.x-dev is worthwhile I can convince them to install this version too. In which sense is it better?
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Old   October 13, 2017, 15:26
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Lasse Brams Vinther
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Hello vs1

I have used a custom solver based upon the CHT solver and the reactingfoam solver, using the following for heat transfer boundary condition through fluid to solid interface for the fluid side and solidThermo for the solid side and it worked like a charm.

Code:
        type            compressible::turbulentTemperatureCoupledBaffleMixed;

        value           uniform 692;

        kappaMethod     fluidThermo;

        Tnbr            T;
Let me know if you have any questions.

Best regards
Lasse
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