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  • #42

Closed
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Opened Feb 08, 2018 by Lukas Riedel@lriedel🛀Owner

improve Newton solver parameters

There were a couple of issues observed with the Newton solver:

  1. AbsoluteLimit lower than 1e-8 is not observable in the (single precision) VTK output.
    • ...but in mass conservation, see #39 (closed).
  2. If AbsoluteLimit is too high, the solver will not perform an iteration for small time steps and weak dynamics.
  3. We don't use Reduction.

Propositions:

  • AbsoluteLimit = 1e-10
  • Reduction = 1e-4: To save time, allow a lower defect if the reduction is sufficient
  • ForceIteration = true: make sure that we don't skip dynamics
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Reference: dorie/dorie#42