1. An element of volume for the separated up-flow of water and steam in a channel is shown in the…

1. An element of volume for the separated up-flow of water
and steam in a channel is shown in the figure. Use the conservation equation of
momentum at steady-state and directly derive Equation Va.2.4.

2. Derive _Pacc by applying the momentum equation
between inlet and outlet. [Hint: F = _(momentum flux). Use F = A_P
and substitute for momentum out = m f Vf + m gvg 
and for momentum in = mi Vi. Then replace each velocity by mass flow rate
divided by _A and introduce _ and x to replace area and
mass ratios].