How to make MHD model works in a moving solid

- April 19, 2022 at 2:05 am
  
  kevin.anny
  Subscriber
  
  I'm trying to solve the current of a moving solid in magnetic field, I tried frame motion and mesh motion, but the current remains zero. While I change the solid to a very viscous fluid, MHD worked. It seems Fluent don't solve the solid motion in magnetic field. How could i make it works?
  Any help will be highly appreciated. Thank you!
- May 6, 2022 at 12:55 pm
  
  KR
  Administrator
  
  Hello Which version of Fluent are you using?
  Also, how are you setting up the motion in the solid? Can you share some screenshots?
  Karthik
- May 6, 2022 at 1:20 pm
  
  kevin.anny
  Subscriber
  
  Hi I'm using Fluent 2020R2.
  That's my setting. I tried frame motion and mesh motion, both of them don't work with MHD model. It means electromagnetic equation of MHD is not solved in the solid region.
- May 6, 2022 at 4:00 pm
  
  Konstantin
  Ansys Employee
  
  Hello This is a limitation that MHD will not generate the Lorentz force inside the solid (no source terms in solid zones defined to accommodate this). The best solution is to do exactly what you are trying: use fluid with properties of solid. You can fix the velocities inside the zone or use high viscosity.
- May 6, 2022 at 4:03 pm
  
  kevin.anny
  Subscriber
  
  Thank you for the answer.

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