The chapter is still unsatisfying in my eyes. I would like to see
a more systematic method for quantifying pressure difference
in pipes (mixing height, expansion/contraction, local losses,
and wall friction losses).
I would also like to see a good systematic (even if approximate)
exploration of the dependency between the main parameters at hand.
* Delta p_friction is now uniformly refered to as Delta p_loss
* Ditched entrance effects, focus in on fully-developed flow and
* Summary added at end to better picture relevance of chapter in
view of the entire course