modeling equilibrium state of 2-phase saturated nitrogen
 

hello alls
hope you have a good day. I want to model a equilibrium state of the 2-phase saturated nitrogen using CFX recently , but no idea how to do that.
problem description:

a cooper bar is inserted into a pressure vessel which is colsed and full of liquid nitrogen initially . all boundary congditions are adiabatic except two
planes: the top of the bar keeping the constant temperature 300K ,and the bottom of the vessel keeping 70K.
so heat leak into the vessel and go out through bottom .
that lead to pressure , level state in a equilibrium.
I only interested in the steady modeling .

who have experience in modeling such a phenomenon, please give me some suggestions.
best regards, mu

I appreciate giving a email to me

muyongbin@163.com

This would be very hard to model in CFD. If you are interested in the final steady state answer I would try to simplify it down to a 1D model and use matlab or a fortran program to solve it. Is that possible?

thanks ghorrocks
 

thanks ghorrocks
it can not be simplydied to 1D .
as it is just one part of an integral problem in practice

best regards
mu