BC in export from hyper mesh to fluent
 

hey friends
I have some problem with export files from hyper mesh to fluent...My model is complex (cylinder head) & I can't visit it in fluent easily. the boundary conditions didn't define & didn't export from hyper mesh to fluent. how can I solve this problem?
can I solve this by define a set of nods in hyper mesh? how does fluent recognize the set of nods?
please let me know...
:confused: