On 09/13/2017 09:12 AM, Zhibo Luo wrote:
I encountered a problem recently when I refine and coarse mesh. I know
the material id is inherited from mother to child cell upon mesh
refinement. But what is the rules when coarsening the mesh? For example,
in 2D, I have four neighbored cells which have different material ids,
then what is the material id when these four cells are combined into one
cell? what I should do if I want to coarsening the cells with the same
material id?
It's just the same value as you set before you refined the cell originally.
When you refine cells, the children are new and we need a rule what
their material_ids should be. But when you coarsen these children again,
then the mother cell you get has been there all along -- so we need no
rule what material_id it should get, it just retains the material_id it
has always had.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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