- #1
Feodalherren
- 605
- 6
Homework Statement
Homework Equations
ρ=789, μ=.0012
The Attempt at a Solution
From the energy equation we get hf=0.9
We know that hf=f(L/D)(V^2)/(2g)
[sorry don't know how to use latex after they removed the bar on the right]
Now I can substitute V for Q, but I'm stuck with f and Q as unknowns and I only have one equation. The solutions manual did something weird :
128μLQ/πρgd^4
It looks like they substituted f for something, but I can't figure out what. I only know how to look up f in the Moody diagram or 64/Re for laminar flow. Did they iterate it somehow?