Anisotropic thermal conductivity

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Luciano Garelli
Posts: 217
Joined: Fri Dec 04, 2015 1:42 pm

Anisotropic thermal conductivity

Post by Luciano Garelli » Fri Aug 16, 2019 2:31 pm

Hello,

I'm solving a Conjugated Heat Transfer (CHT) problem using the internal coupling capability of CS modelling several solid parts. Some of this parts has anisotropic thermal conductivity. Is it possible to set this property?

The only way that I found is through the idften tensor, but I'm no sure because this tensor is associated with the turbulence viscosity.

Regards,
Luciano

Yvan Fournier
Posts: 2689
Joined: Mon Feb 20, 2012 3:25 pm

Re: Anisotropic thermal conductivity

Post by Yvan Fournier » Fri Aug 16, 2019 10:44 pm

Hello Luciano,

As some colleagues reminded me this is tested in the FVCA7 verification cases, here is the setup from a few months ago for anisotropic (CASE2) and orthotropic (case3) pure diffusion cases.

I am not too familiar with this test case, but I hope you find an appropriate example in it.

I did not add the meshes, as this is jus to see how the settings are done.

Best regards,

Yvan
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fvca_anisotropic.tar.gz
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Luciano Garelli
Posts: 217
Joined: Fri Dec 04, 2015 1:42 pm

Re: Anisotropic thermal conductivity

Post by Luciano Garelli » Sat Aug 17, 2019 12:07 am

Hello Yvan,

Thanks for the example. The files inside the tar.gz seems to be symbolic links.

Could you check it.

Thank you very much.

Regards,
Luciano

Yvan Fournier
Posts: 2689
Joined: Mon Feb 20, 2012 3:25 pm

Re: Anisotropic thermal conductivity

Post by Yvan Fournier » Sun Aug 18, 2019 3:09 pm

Hello,

Sorry for the incorrect archive.

This one should be ok.

Best regards,

Yvan
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fvca_anisotropic.tar.gz
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Luciano Garelli
Posts: 217
Joined: Fri Dec 04, 2015 1:42 pm

Re: Anisotropic thermal conductivity

Post by Luciano Garelli » Thu Sep 05, 2019 9:06 am

Hello Yvan,

Thank you for the example. I have being running few very simple example and I have a pair of questions.

For the case of the temperature field the "anisotropic_turbulent_viscosity" tensor "visten" should be filled with the thermal conductivity or the thermal conductivity/(rho*cp). I'm using the last option.

If a reference thermal conductivity is defined, the resulting anisotropic thermal conductivity is the addition of this reference thermal conductivity plus the "visten" tensor.

Finally, checking the temperature value at the boundary faces looks like it is not taken into account the anisotropic field, is just computed with the reference thermal conductivity.

Thanks in advance.

Regards,
Luciano

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