On 8/3/22 01:34, LY XXXiao wrote:
I have a further question though. The background is that, I am doing some
electromagnetic geophysics simulation based on an octree mesh, and before
that, I make a rectangular base mesh (make_grid) using
*GridGenerator::subdivided_hyper_rectangle*. For the current case, my mesh
size is 41*41*37, it will take 90s to make the grid. Is this time cost
reasonable, as I don't feel so..
It probably shouldn't take that long. Do you think you could come up with a
small test program (only containing the generation of the mesh) that
illustrates the issue and shows that the time is really spent in the
generation of the mesh?
As a general rule, though, one should try to create meshes by using as coarse
a mesh and then refine it. That's obviously not possible with a 41x41x37 mesh
because these are all prime numbers, but if you had wanted a mesh with
40x40x36 cells, for example, then one would generate a 10x10x9 cell mesh and
refine it globally twice.
Best
W.
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Wolfgang Bangerth email: [email protected]
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