Reynolds Transport Theorem
From charlesreid1
Reynolds Transport Theorem is always a safe starting point.
In a way, it is the most fundamental starting point.
Fundamental balance equation:
$ \mbox{in} - \mbox{out} + \mbox{generation} - \mbox{consumption} = \mbox{accumulation} $
Reynolds Transport Theorem is a formal way of performing this balance over a fluid control volume, of arbitrary shape.