Cylindrical combustion chamber expanding mesh
 

Hi,

I am trying to model a cylindrical combustion chamber which increases in radius over time to simulate the effects of fuel regression but I can't figure out how. Ive been through the Fluent manuals loads to try and figure out how to do it but it seems that Fluent is only capable of simple linear motion with regards to moving meshes. Is it a sliding or dynamic mesh I need and can it be done without writing a UDF? Any response would be most appreciated.

Neil