A diffuser in a pipe flow is basically a slow expansion of the pipe diameter, which slows down the fluid

speed and increases the pressure $($the Bernoulli effect$).$ Water at room temperature flows with a volume

flow rate of $0\mathrm{.}0250$m$^(3)//$s through a horizontal diffuser in which the pipe diameter increases gradually

from D$\_(1)=6\mathrm{.}00$cm to D$\_(2)=11\mathrm{.}00$cm$.$ The irreversible head loss through the diffuser is estimated

to be $0\mathrm{.}480$ m $.$ The flow is turbulent, and the kinetic energy correction factors at both the inlet and the

outlet of the diffuser are assumed to be $1\mathrm{.}05.$

It may be surprising that the answer to part $($a$)$ is positive, i$.$e$.,$ the pressure rises downstream. How is this possible?

Explain by calculating the change in energy grade line $/\_\backslash$EGL and the change in hydraulic grade line $/\_\backslash$HGL from the

upstream to the downstream location. In particular, does EGL go up or down, and does HGL go up or down? $($Round the

final answer to three decimal places. Include a minus sign if necessary.$)$

The change in energy grade line Delta EGL is calculated to be

m$.$

The change in energy grade line $/\_\backslash$HGL is calculated to be

m $.$

ONLY NEED EGL. HGL IS CORRECT