How to define the boundary condition
 

Hi friends: I have one problem.After every an iteration ,I want to define the quantities just above wall boundary as wall boundary conditions.Then the quantities of wall can change with the quantities of fluid.

The thread in DEFINE_PROFILE() just point to the boundary when I define boundary condition.Then I just get the quantities on the boundary.Now I still cannot get the the quantities near wall boundary before every an iteration .How can I solve it??

Thank you! Any replay will be welcome.