How to simulate a multi phase flow striking a surface and causing it to wear??
 

I am a mechanical engineering student. i would like to simulate a situation which has the medium as fluid with small solid particles mixed with them for a research project. This multiphase medium will strike on walls of a cylinder and i need to find its impact on the walls. The cylinder material (how can i specify this) will wear off a little bit and we need to find the final dimension of the cylinder, after the experiment. Can you guide me on how to proceed in ANSYS??

Any help is highly appreciated as this is my final year project and is very important.

Thanks in advance.