[pingub]

Hello!
I need to perform some transient simulations regarding the interaction between a turbomachine and a pipe in water-hammer conditions.
In such a simulation the boundary conditions of the turbomachine depend on time, but i cannot use CEL expressions to define them, because they are solutions of the hydraulic problem inside the pipe.

For some reasons i wouldn't insert the pipe in the cfx computation as a mesh, but i'd like to solve the hydraulic problem inside the pipe with the 2 differential equations of motion of the water in transient condition with a characteristic lines method (it's a numerical method used to solve a pair of differential equations).

In this way the boundary conditions of the pump (Head downstream and Discharge upstream) would be the solutions of the interaction between the water hammer problem and the machine behaviour.

Now my question is:
- Can I use CCL to implement the characteristic lines method? How can I do?
- I'm pretty sure that the answer to my first question will be negative, so:
- Can I use FORTRAN to implement the characteristic lines method? How can I do?

I've never used fortran with CFX, and i did'nt any advice on CFX12 documentation.

I hope someone could help me.
Thanks,
pingub