Thermal diffusivity is not properly computed on both sides of an internal boundary in INSFV
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GiudGiud commented
Bug Description
See INSFVEnergyDiffusion, the neighbor side is used for the local element side
Steps to Reproduce
Run a case with a complex diffusivity like the one I am adding in #27425
Impact
Errors on sharp diffusivity boundaries
Still conservative though
[Optional] Diagnostics
No response