dynamic mesh error negative cell volume -FSI

- June 26, 2019 at 2:28 am
  
  1993saurav
  Subscriber
  
  So, I was running an FSI on an aortic valve of the heart but I have this problem .after a certain time step, I get negative cell volume. i change the re-meshing parameters when that happens and it seems to work for one or two timesteps than it gives the same error.i have played around with solution stabilization and implicit update and lots of other stuff but it gives me this error.
- June 26, 2019 at 10:51 am
  
  Rob
  Forum Moderator
  
  It often means that the motion is too fast for the current time step & cell size. Reduce the time step and also check how the remeshing is behaving in case you're getting small gaps.
- June 27, 2019 at 4:49 pm
  
  1993saurav
  Subscriber
  
  i have checked remeshing parameters and tried to manipulate it with the mesh metric info. it seems to fail anyways .yeah, reducing the time step might help but i dont know if i can change the time step in the middle of the simulation .i have significant solutions until this failed time step .
- July 1, 2019 at 4:14 pm
  
  Rob
  Forum Moderator
  
  If you can stop & restart the solution you should be able to change the time step. Otherwise you may need to start again.
- June 20, 2020 at 9:44 am
  
  FarhanMuhib
  Subscriber
  
  Have anyone found the solution to this problem?
  Thanks.