On 6/24/22 00:22, LY XXXiao wrote:
I have already a basic mesh with 120 cells, and I only want to refine one
element among them, so I set a refine_flag for this element. But the
refinement does not happen ?? Is there anything else that I missed? I learned
step 1 and step 6 for meshing problem.
When you call the constructor of Triangulation, you provide "refinement flags"
that determine how refinement should happen. If you only mark one cell, you
would create an "island" of refined cells that has five additional degrees of
freedom, four of which are hanging nodes. This isn't worth it, and some of the
refinement flags will specifically avoid this kind of thing. You will want to
choose flags that allow it.
Best
W.
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Wolfgang Bangerth email: [email protected]
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