Im doing a FSI simulation and all equations converge except for the turbulence equation. With k-eps, I get a FINMES error. With SST, O-TurbFreq shows following lines at timestep 57 and 58:

57: | O-TurbFreq | 0.96 | 3.9E-03 | 1.4E-02 | 44.3 2.0E-06 OK|

58: | O-TurbFreq | NaN | NaN | 2.3E+00 | 11.8 0.0E+00 OK |

The other equations converge and the run ends normally. How come one of the turbulence won't converge?

These are my mesh values:

Minimum Orthogonality Angle [degrees] = 63.5 OK

Maximum Aspect Ratio = 82.0 OK

Maximum Mesh Expansion Factor = 3.6 OK

Cheers

Does this error occur in the 1st iteration? If yes, you need to change the initial conditions. If not, try to change the mesh size.

Abduri,

Have you read the documentation on "obtaining convergence"? Also some more tips are here: http://www.cfd-online.com/Wiki/Ansys...gence_criteria

Glenn Horrocks