How do I resolve this floating point error in the fluid domain of my FSI simulation?

- May 29, 2022 at 5:20 am
  
  dxc200018
  Subscriber
  
  I'm doing an FSI simulation.
  (This isn't related to my last post. Its a similar simulation with a different geometry for the fluid domain)
  I start getting floating point errors in the fluid domain.
  "Divergence detected in AMG solver: x-momentum
  Divergence detected in AMG solver: y-momentum
  Divergence detected in AMG solver: z-momentum
  Divergence detected in AMG solver: pressure correction
  Error at Node 15: floating point exception
  Error at Node 16: floating point exception
  Error at Node 17: floating point exception"
  Is this related to my boundary conditions?
  I have 2 walls and 1 pressure outlet with a UDF imposing an exit pressure.
- July 1, 2022 at 5:22 pm
  
  Karthik Remella
  Administrator
  
  Hello,
  Your dynamic meshing setup seems to be incorrect. You have picked up all the options - Smoothing, Layering, and Remeshing. What type of mesh are you working with - unstructured tetrahedral? Also, which surfaces are you having moving and deforming meshes? Could you please highlight in a screenshot?
  The divergence seems to be associated with your dynamic mesh settings. At what point in your simulation are you seeing this issue? Is it at the very beginning?
  Thank you.
  Karthik
  - July 9, 2022 at 11:19 pm
    
    dxc200018
    Subscriber
    
    Sorry, my reply is in the other comment.
- July 6, 2022 at 10:09 pm
  
  dxc200018
  Subscriber
  
  "What type of mesh are you working with - unstructured tetrahedral?"
  yes
  The error occurs at the beginning of the simulation.