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AC purturbation on top of a DC voltage

Posted Apr 21, 2020, 6:01 p.m. EDT Electromagnetics, Low-Frequency Electromagnetics, MEMS & Nanotechnology, Structural Mechanics Version 5.5 1 Reply

Golam Kibria Chowdhury
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Please see the attached MPH file for drawing.

  1. How to excite a slab with an AC perturbation voltage on top of a DC bias voltage in COMSOL? Let's say I have a slab, I want to apply voltage on both ends as,

  2. How do I properly apply the fixed constraint? If I apply, let's say, a dc voltage to the slab on both sides, it will be squeezed from both ends.

  3. How to incorporate an infinite artificial domain around the slab so that the electric field is zero at infinity?

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1 Reply Last Post Apr 23, 2020, 12:01 p.m. EDT
Dave Greve
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Posted: 5 years ago Apr 23, 2020, 12:01 p.m. EDT
Updated: 5 years ago Apr 23, 2020, 12:02 p.m. EDT
  1. Frequency Domain Prestressed.
  2. Look into: fixed displacement in SOME axes; Rigid Motion Suppression.
  3. There is no infinity in COMSOL. Look into Infinite Element Domain as an approximation.

D.W. Greve DWGreve Consulting

1. Frequency Domain Prestressed. 2. Look into: fixed displacement in SOME axes; Rigid Motion Suppression. 3. There is no infinity in COMSOL. Look into Infinite Element Domain as an approximation. D.W. Greve DWGreve Consulting

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