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What Can Be the Reasons for Unrealistic Velocity Values in the Simulation?

There may be a number of reasons why you may see unrealistic values in your CFD simulations:

  • Unrealistic initial values
  • Incorrect boundary conditions
  • Bad elements in mesh
  • Etc.

If you are sure about your simulation settings, check the mesh quality.

Visually check your mesh. Are there any missing regions?

  • If there are, its more than likely due to the element size being higher than the thickness of the particular section of the domain.

I you see small features and want to ignore them, you can assign the relevant size to ‘small feature suppression’.

Next, check to see if there are enough elements in gaps?

  • If not, try using our “gap refinement” feature under the general mesh settings

If the mesh looks OK, check the Meshing Log

Last updated: April 1st, 2021