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this follows how it is done in pyro for the fv4 solver
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closes #3017 |
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with an explicit sponge, there is an additional timestep limiter for stability, basically dt < tau_sponge. |
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PR summary
this only should work explicitly and is a direct damping force.
This formulation matches how it is done in pyro for the FV4 solver.
PR motivation
PR checklist
CHANGESfile has been updated, if appropriate