Force Exerted by fluid on a Bend, an Enlargement, or a Contraction

[sandmanvgc]

Homework Statement

I’m looking at the FE manuals equation which to me doesn’t look the same as one in practice problem review book. Am I wrong and not looking at it right?

Relevant Equations

3rd pic attempt to convert book equation into manual

My attempt to try and convert book equation to FE manual equation in 3rd pic

Fx = QpV1 + P1A1 -  QpV2Cosa - P2A2Cosa

Fx = P1A1 - P2A2Cosa+ Qp(V2Cosa +V1)

P1A1 - P2A2Cos(a) - Fx = -Qp(V2Cosa +V1)

 

[haruspex]

There's a sign error in eq 11.49 in the second attachment. It should clearly be $(-\dot m\bar V_2-...$, not $(\dot m\bar V_2-...$.

 

[sandmanvgc]

There's a sign error in eq 11.49 in the second attachment. It should clearly be $(-\dot m\bar V_2-...$, not $(\dot m\bar V_2-...$.

The book has an example problem too, I wasn't getting the answer using the FE manual's equation. Frustrating time lost on trying to do these