modeling moving boundary in ansys flotran

Hi

I want to model a piston and cylinder in ANSYS FLOTRAN.
The piston is moving up and down sinusoidal in cylinder and the compressible
gas inside the cylinder is compressing and expanding with time. How can I model
this problem in ANSYS FLOTRAN?

Thanks,

Hi

I want to model a piston and cylinder in ANSYS FLOTRAN.
The piston is moving up and down sinusoidal in cylinder and the compressible
gas inside the cylinder is compressing and expanding with time. How can I model
this problem in ANSYS FLOTRAN?

Thanks,