Discussion Forum

Hi. I am using Magnetic and Electric Fields (mef) physics module with Electric Circuit (cir) physics. I am applying a Velocity (Lorentz Term) to the mef physics to simulate a Hall Effect voltage. I am applying a Terminal as an electrical current source to the same physical geometry. The solver appears to solve the problems independently, whereas I would expect a multiphysics model to treat the boundary conditions simultaneously as two separate voltage sources on two adjacent surfaces oriented 90 degrees apart. The mef solver generates a "V" variable, and the cir solver generates a "V2" variable. The results plot options reflect that as two separate solutions. (The file is too big to upload.) Maybe the issue is that you can't have two adjacent voltage sources since the higher potential will flow current over to the lower potential voltage source? Hence, have to come up with the sophisticated method provided by Walter Frei https://www.comsol.de/blogs/how-to-model-a-hall-effect-sensor-with-comsol-multiphysics/, to induce transverse current flow, representing the Hall voltage?