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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Calculating Electrosotatic Force

Posted 2012年7月11日 GMT-4 17:50 MEMS & Nanotechnology, MEMS & Piezoelectric Devices, Materials, Structural Mechanics Version 4.2a 2 Replies

Salvador Mendoza
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Hi, I'm trying to simulate a varactor using air as dielectric between the plates. I based my analysis on the 2D-3D cantilever beam, using the Solid Mechanics, Moving Mesh and Electrostatics physics, but I can't get it to work. When I choose air as a material for a subdomain enclosing the structure, it need some mechanics parameters (E, Y, etc) that air does not have. How can I solve this? Many thanks
2 Replies Last Post 2012年7月13日 GMT-4 07:50
John H.
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Posted: 1 decade ago 2012年7月12日 GMT-4 09:59
I've never done a solid mechanics simulation (I don't have the module)... But the way you describe it, I'm guessing you haven't excluded the air domain(s) from the list of domains where the Solid Mechanics interface is active. After all, air is not "solid", so it makes no sense to have the Solid Mechanics interface try to solve a system of equations that is not valid in that particular domain.
I've never done a solid mechanics simulation (I don't have the module)... But the way you describe it, I'm guessing you haven't excluded the air domain(s) from the list of domains where the Solid Mechanics interface is active. After all, air is not "solid", so it makes no sense to have the Solid Mechanics interface try to solve a system of equations that is not valid in that particular domain.
Ceren B
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Posted: 1 decade ago 2012年7月13日 GMT-4 07:50
Why do you need a solid mechanics for it?

By saying a varactor, you mean a varactor diode, right?
Why do you need a solid mechanics for it? By saying a varactor, you mean a varactor diode, right?

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