[kishorkumar]

I am solving a condesation process in a shell(with a single helical tube in which cool water at 10degrees in moving) and tube surrounding the hellical tube, the tube is with hot moist air say around 80 degrees.
I am doing mesh in ICEM-cfd, and CFX solver.
but because iam totally new to this kind of problem I tried to search in tutorials and google but could not find any of such.
So please do help how to solve.
I did meshing in ICEM-cfd and while solving.. which model need to solve,
either homogenious or non homogious and specifing the domain fluids
water and air how to proceed with interface ? between shell and tube?
but i have only one surface to specify interface between shell and tube
please update on condesation processs.
how to proceed in CFX to solve this.
Thank you,