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Magnetic Field in Time Dependent Study
Posted 27 ott 2022, 10:14 GMT-4 Electromagnetics, Studies & Solvers, Physics Interfaces Version 5.2a 1 Reply
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I want to move a conductor through a constant magnetic field of 1 T. How do I create this constant magnetic field?
My solution until now is an ampere law with remanent flux density. I then change the B_r for y until I get 1 T in the middle of my domain. It is not perfect, but it is a solution.
As long as I use a stationary study. When I use a time depentent study, which is of course what I need when I want to move the conductor, I get the following Error (translated from german): No consistent starting values found. Undefined value found. NaN or Inf at Solution of the linearized Equation System with BiCGStab. Last time step did not converge. - Feature: Timedependent Solver 1 (sol1/t1)
So, is there a better way to create a homogeneous magnetic field? Or if not, how can I make the amperes law work in a time dependent study?
https://www.dropbox.com/s/tr7gt3u3nxxhjay/10_27_MagFieldMovMeshError.mph?dl=0
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Hi Annika,
you have two (maybe more) options to create a uniform magnetic field:
- Solve for the reduced field and enter the background field or vector potential. or
- Apply a suitable vector potential to the outer boundaries of the modeling domain
For a time dependent study you would typically run a stationary study step before, to make sure the time dependent study starts with suitable initial values.
Cheers Edgar
-------------------Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com