Dear Users.  

I am currently having a huge issue solving this error massages I've got from modeling using CEL.

***ERROR: The ratio of deformation speed to wave speed exceeds 1.0000 in at least one element. This usually indicates an error with the model definition. Additional diagnostic information may be found in the message file.

I have no idea how to resolve this problem, I am seeking for your help.

I wanted to see the fluid motion inside a washing machine which rotates with a high number of RPM. ~1200rpm 

I simplified the full model to test CEL method. I made a hollow tube using continuum shell SC8R (Fluid is inside the tube).

Loading condition is a simple transnational displacement : 16mm/0.05s (explicit code)

More detailed descriptions are below to help you understand better. 

If you need more detail, leave me messages.

Cheers.