friedmud
commented
7 years ago There are other other options. Instead of doing interpolation we could use an L2 projection to get the new values. That would perfectly preserve the concentration. On Wed, Jan 18, 2017 at 11:16 PM Daniel Schwen notifications@github.com wrote:
Description of the enhancement or error report
If coarsening happens in a phase field simulation conserved order parameters do not have their value perfectly conserved, as the integral over the coarse element is likely to be different than the integral over the refined children. I would like to attempt to fix this by adding source terms that exactly compensate the local non-conservation. Rationale for the enhancement or information for reproducing the error
Solute conservation is essential to produce reproducable results between runs with and without adaptivity. Solute drift affects the system's free energy considerably. Identified impact
Eliminate the unexpected solute drift. Existing simulations are unaffected.
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dschwen
YaqiWang
Description of the enhancement or error report
If coarsening happens in a phase field simulation conserved order parameters do not have their value perfectly conserved, as the integral over the coarse element is likely to be different than the integral over the refined children. I would like to attempt to fix this by adding source terms that exactly compensate the local non-conservation.
Rationale for the enhancement or information for reproducing the error
Solute conservation is essential to produce reproducable results between runs with and without adaptivity. Solute drift affects the system's free energy considerably.
Identified impact
Eliminate the unexpected solute drift. Existing simulations are unaffected.