Tutorial required
 

Hi everyone. I am new to Fluent and Gambit. I am working on a project which requires analysis of a body moving inside a fluid domain (a moving core inside a tube).

I have tried by declaring the core as a wall and then declaring it as a wall. Then I have given it a velocity (moving wall option) in Fluent. But I need a tutorial for doing the dynamic mesh/ moving mesh part. i have searched on internet but came up with nothing.