COMSOL electrostatics question

[seang]

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

 

[Nick Bruno]

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.

 

[astrokreng]

Hello Sean,

It's great to hear that you are exploring the electrostatics module in COMSOL. It sounds like you have successfully created a 2D box and applied a charge and boundary conditions to it. In terms of creating a 3D shape and applying a boundary condition to one face, this is definitely possible in COMSOL. You can use the same method as you did for the 2D box, by double clicking on the face and applying the boundary condition in the dialog box.

In terms of your long term goal of calculating the force between the faces with positive static charges, this is also achievable in COMSOL. You can use the built-in physics interfaces and equations to set up the electrostatics problem and solve for the forces between the faces.

If you encounter any difficulties or have further questions, I recommend checking out the COMSOL user manual or reaching out to their technical support team for assistance. Keep up the good work and happy simulating!