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  • ExaHyPEExaHyPE
  • ExaHyPE-EngineExaHyPE-Engine
  • Issues
  • #294
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Issue created Aug 30, 2019 by Dominic Etienne Charrier@domchaOwner

Halo Refinement Threshold

Aim:

Prevent that the mesh refinement iterations are triggered to often.

Background:

During the mesh refinement iterations, we refine the Leaf cell parents of those Virtual cells that carry a refinement status greater than zero.

Currently, the time stepping iterations trigger refinement as soon as a Virtual cell carries positive refinement status. Especially with low order ADER-DG plus Limiter, mesh refinement is triggered quite often, which seems to be related to the CFL time step size: "Shock does not stay "long" in the same cell".

Approach:

During the time stepping iterations, allow Virtual cells to carry a refinement status smaller some positive threshold value. Only if this threshold value is reached, trigger that the mesh is adapted.

Additional, we could think about allowing erasing only every $k$ mesh adaptions (=set of mesh refinement iterations).

Edited Aug 30, 2019 by Dominic Etienne Charrier
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