Erosion Star CCM+
 

I am doing erosion modeling inside a pipe with sudden contraction and trying to compare it with the experimental results with different particle size. As in experiments increasing particle size increases the erosion rate.

But the problem I am facing is changing the particle size should increase the erosion rate but this not happening in my case...any suggestions??

I am using Neilson Model as specified in research paper with k-epsilon turbulent model.

Where I could be most possibly wrong carrying out the erosion simulation.
Your advice is most valuable...