Chapter 5, Problem 5.19P

Interpretation Introduction

Interpretation: The pressure rise in the pipe is to be calculated when the valve is closed from one end.

Concept introduction: There is a change in pressure whenever some external condition is

applied to the system. The change in pressure is given by the following equation,

  $\text{ΔP}\text{= }{\text{ρ×(v}}_{\text{av}}\text{)×(Δv)}$ ...... (1)

Here,

  $\begin{array}{l}\text{ΔP}\text{= Change or rise in pressure}\\ \text{ρ}\text{=}\text{Density}\text{of water}\text{=}\text{1000}{\text{kg/m}}^3\\ {\text{(v}}_{\text{av}}\text{)}\text{=}\text{Average velocity of}\text{water in pipe}\\ \text{(Δv)}\text{=}\text{Change in velocity}\text{of}\text{water}\end{array}$