COMSOL electrostatics question

  • Context: Undergrad 
  • Thread starter Thread starter seang
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    Comsol Electrostatics
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SUMMARY

The discussion focuses on using the electrostatics module in COMSOL Multiphysics for both 2D and 3D simulations. The user successfully created a 2D box with boundary conditions but faced challenges when attempting to apply boundary conditions to a 3D extruded box. A key solution provided was to ensure that the 3D option is selected when starting a new project in COMSOL. The user aims to apply static charges to opposite faces of the 3D box and calculate the resulting forces.

PREREQUISITES
  • Familiarity with COMSOL Multiphysics interface
  • Understanding of electrostatics and boundary conditions
  • Basic knowledge of 3D modeling concepts
  • Experience with static charge applications in simulations
NEXT STEPS
  • Learn how to set boundary conditions in COMSOL for 3D geometries
  • Explore the electrostatics module features in COMSOL Multiphysics
  • Investigate methods for calculating forces between charged surfaces
  • Review tutorials on creating and manipulating 3D geometries in COMSOL
USEFUL FOR

This discussion is beneficial for engineers, researchers, and students working with COMSOL Multiphysics, particularly those focusing on electrostatics simulations and 3D modeling techniques.

seang
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Hello,

I am trying to use the electrostatics module in COMSOL ( I just started a few days ago). The other day, I was able to create a 2D box, apply a charge at one side (via boundary condition), and ground the other sides. I solved, and got a neat output, that I suspect is correct.

Then, I tried to create a box, extrude it, and apply a boundary condition to one face, but, I was unable to. For the 2D box, I just double clicked, and BC dialog came up, is it possible to do this for a 3D shape? Applying a _static_ boundary condition to one face of the box is my immediate problem.

In the long run, I hope to apply a positive static charge to one side, a positive static charge to the opposite face, and calculate the force between the faces.

Thanks for your help,
sean
 
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Sean,
make sure 3D is selected from your initial menu while opening comsol. Once in the 3D environment (with your box drawn) set the boundary conditions. I think this should work.
 

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