Negative Pressure

$/6\mathrm{.}5$

Water flows in a new ductile iron pipe between reservoirs A and $B,$ as shi

The pipe is elevated in the middle at $S,$ is cavitation a concern?

New ductile iron pipe diameter:

New ductile iron pipe length: $,20cm$

distance from A to S downstream: $,150m$

Water surface elevation difference

between A and B :

$s=$

$25$ m

$6\mathrm{.}6$ m

Solution:

Balancing energy between the upstream reservoir and the summit, where cavii occur, would yield two unknowns, the pipe velocity and the pressure at the sur

$1.)$ Therefore, balance energy between the upstream reservoir $(A)$ and the downst

Thus $z_A+\frac{p_A}{}+\frac{v_A^2}{2g}=z_B+\frac{p_B}{}+\frac{v_B^2}{2g}+h_L$