Jeff Hiller
COMSOL Employee
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Posted:
6 months ago
01.02.2024, 08:40 GMT-5
Updated:
6 months ago
01.02.2024, 08:29 GMT-5
It does look like your mesh is too coarse.
Jeff
-------------------
Jeff Hiller
It does look like your mesh is too coarse.
Jeff
Please login with a confirmed email address before reporting spam
Posted:
6 months ago
01.02.2024, 09:20 GMT-5
Hi, I tried to use the "extremely fine" mesh in the physics-controlled mesh option but the pattern is still identical, why?
thanks in advance
Hi, I tried to use the "extremely fine" mesh in the physics-controlled mesh option but the pattern is still identical, why?
thanks in advance
Jeff Hiller
COMSOL Employee
Please login with a confirmed email address before reporting spam
Posted:
6 months ago
01.02.2024, 09:51 GMT-5
Updated:
6 months ago
01.02.2024, 15:05 GMT-5
My guess is that the "extremely fine" setting results in a mesh that, its name notwithstanding, is too coarse to capture the solution. I figure from your screenshot that there may only be ~3 elements across that waveguide. If I am right about that, you will need to use more subtle ways of specifying your mesh than a global setting. The chapter on meshing in the Reference Manual contains valuable advice and examples. For this particular analysis, you may want to consider using a swept mesh for the waveguide, see this blog post on swept meshes.
Jeff
-------------------
Jeff Hiller
My guess is that the "extremely fine" setting results in a mesh that, its name notwithstanding, is too coarse to capture the solution. I figure from your screenshot that there may only be ~3 elements across that waveguide. If I am right about that, you will need to use more subtle ways of specifying your mesh than a global setting. The chapter on meshing in the Reference Manual contains valuable advice and examples. For this particular analysis, you may want to consider using a swept mesh for the waveguide, see [this blog post on swept meshes](https://www.comsol.com/blogs/improving-your-meshing-with-swept-meshes/).
Jeff