Isothermal domain bc #684
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Isothermal domain bc #684
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hsitaram
approved these changes
Aug 25, 2023
marchdf
reviewed
Aug 28, 2023
marchdf
reviewed
Aug 28, 2023
marchdf
reviewed
Aug 28, 2023
marchdf
reviewed
Aug 28, 2023
marchdf
approved these changes
Aug 28, 2023
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This PR adds a robust isothermal wall capability. It addresses a need that has been brought up in various discussions/issues in the past (#263 #265 #502).
Isothermal walls are handled by separately computing the heat flux through walls after computing other diffusive fluxes (similar to how we handle EB isothermal wall fluxes). This avoids any issues with setting ghost cells that may affect the hydro calculations at the walls and also allows the values to be set directly on the face.
We see good agreement with and 2nd order convergence to the analytical solution for thermal diffusion from a wall into a semi-infinite medium
Tnorm = erf(x/sqrt(4*alpha*t))without hydro. Note the test includes diffusion from all walls in the domain but the data is taken early enough that the effects of various walls haven't started interacting with each other yet.Draft until documentation is added.