Adding thermal conductivity, heat capacity and diffusivity as outputs.

[Cristopher-Morales]

Proposed Changes

This pull request adds the thermal conductivity, heat capacity and diffusivity as output for the incompressible solver in order to help the process of debugging inside SU2. During this process, we found some bugs regarding the diffusivity and thermal conductivity when the FLUID_MIXTURE model is used. Additionally, unused variables for computing the diffusivity have been removed.

Related Work

PR Checklist

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• I am submitting my contribution to the develop branch.
• My contribution generates no new compiler warnings (try with --warnlevel=3 when using meson).
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• I have added a test case that demonstrates my contribution, if necessary.
• I have updated appropriate documentation (Tutorials, Docs Page, config_template.cpp), if necessary.

[bigfooted]

@Cristopher-Morales What's going on with the multizone test setup?

[Cristopher-Morales]

@Cristopher-Morales What's going on with the multizone test setup?

I have updated the multizone restart file, I will update the residuals of this test case.

[pcarruscag]

LGTM