Weird force values in Electrostatics module in COMSOL

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Hey all,

I am trying to simulate the force between a large grounded sphere and a small charge but the values I get do not match the analytical solution and the force in the z-axis, which should be bigger, is around the same magnitude as the force value in the x- and y-direction. Does anybody have an idea of why this is happening and do you have any changes you think could be made to the simulation? The simulation is attached if ever you want to take a look. I have tried changing the dimensions of the spheres and I have made the mesh extremely precise by defining a very small minimum element size and a decently small maximum element size but the results are still off and weird.

Link to GoogleDocs folder with the COMSOL files. You just need to download the files.

Thanks, Nic

0 Replies Last Post 08/05/2020, 15:21 GMT-3
COMSOL Moderator

Hello Nicolas Leblanc

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