Learning Forum

[ivan.beltracchi]

Hi everyone, 

i'm trying to simulate the flow of the fresh concrete (SCC) inside a cast.
I'm considering also inside the analysis two phases with VOF (air and fresh concrete).
For the fresh concrete properties I'm using the Herschel-Bulkley law in order to consider it as a Non-Newtonian fluid.
What kind of viscous model could i use to model it?

With laminar model i'm having problems with the analysis (aborted for divergence) with the following error inside the console:
Error: floating point exception
Error Object: #f

For meshing the geometry I'm using tetrahedral or hexa FE (with a good quality), but i don't know if the problem could be linked to the analysis method or for something else.

Could someone kindly help me?
Thank you so much

 

[Rob]

You can use any viscous model that describes the concrete, HB may be the best option. 

Divergence may be mesh related, and you need to check the resolution too: cell quality just checks the individual elements. Best way to check is display the mesh on a cut plane and look at it. From there, check model and boundary settings paying careful attention to the time step.