Question

The head loss due to sudden expansion is expressed by

• A. $\frac{V_1^2-V_2^2}{2g}$
• B. ${\left(\frac{V_1-V_2}{2g}\right)}^2$
• C. ${\left(\frac{V_1-V_2}{g}\right)}^2$
• D. $\frac{(V_1-V_2{)}^2}{2g}$

Answer 1

The correct option is D $\frac{(V_1-V_2{)}^2}{2g}$

The head loss due to sudden expansion $h_e$ is given by

$h_e=\frac{(V_1-V_2{)}^2}{2g}$

Where V${}_1$ and V${}_2$ are velocities at sections before and after enlargement respectively.