Boundaries
 

Hello,
a couple of questions about boundaries in OF
1. "where" (in a "physical" point of view) are the values of boundaryField stored? (as far as I understand it's in the boundary face centre, I'd like someone to confirm this)
2. I need to compute the value of boundaryField as a function of the internalField value of the 1st cell. Can anyone point me to a portion of the code to look at to have a reference? (I can't find a proper way to access to the internalField cell centre value corresponding to the boundaryField id)

3. (I know I said "a couple" above). Can anyone suggest something to read in order to find answers to trivial questions similar to the ones above? :o

TIA