Fluid Structure Interaction. Tut 20 like Problem

Aziz

Hi,

I have been trying to simulate geometry with Moving Wall boundary condition, the equations are similar like the FSI Tutorial 20 in CFX. the Problem which i am facing is that i cannot model these equation using Expression editor because you cant define variable dependent on Time, i was wondering if some one has developed a Fortran Routine for case like tutorial 20.

For reference i can post these equation too.

F1=known; Fopp=0 (First Time Step); V1=Known; FNEW=F1; V2=(FNEW-Fopp)*DeltaT/mball; FNEW=F1-Fopp;

Unfortunetly i dont have any idea with Fortran in CFX other wise these equation wouldnt be a problem to program it........ What i feel

Thanks

Aziz