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Capacitive comb sensor
Posted Jan 31, 2024, 10:19 a.m. EST Materials, Mesh, Results & Visualization Version 6.0 1 Reply
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I'm trying to simulate a capacitive comb sensor to measure small displacemets. I'm using solid mechanics and eletrostatic physics to simulate this. Dielectric field is air, so i entered the air domain as a Deforming domain in moving mesh. I have applied all the other boundary conditions correctly as well. But i do get errors for some higher displacements of the comb and at the same time it yields results for smaller displacements. I suspect the issue is due to the large deformations of the mesh of air domain. Please help me to get over this.
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Hello Sanjaya,
Since you did not post your .mph file, we can only guess what the errors you are getting are, let alone what's causing them. With that said, a reasonable guess is that as the displacements get larger some of the elements in the mesh get inverted. This is a fairly common situation with moving meshes. Fortunately, several techniques exist to counter that. The following blog posts, which discuss those techniques, may be helpful to you:
https://cww.comsol.com/confluence/pages/viewpage.action?pageId=258526211
and
https://www.comsol.com/blogs/deformed-mesh-interfaces-rotations-and-linear-translations/
Best,
Jeff
-------------------Jeff Hiller