'Rotating Interior Wall' problem on COMSOL
 

Greetings.

I'm using COMSOL Multiphysics 5.3 with 'Rotating Machinery, Mixture Model (rmmf)' physics module. I'm trying to simulate radial impeller in reactor and having an error when the blade counted as 'Rotating Interior Wall' on Rotating Domain. But when I didn't count the blade (just compute the shaft as 'Rotating Wall'), I did not have an error.

The error said that there is division by zero, and therefore having a problem to evaluate expression that having 'turbulent kinetic energy' and 'turbulent dissipation rate' variables.

Has anyone ever encountered this before? I didn't change any variable when computing with 'Rotating Interior Wall boundary' or without it, shouldn't be I have an error for both if I having a 'zero' variables?

Any assistance will be greatly appreciated.

Thank you,
Rubi