# Fluid Mechanics - Torque at hinge of closed vessel

by Aerospace
Tags: fluid, hinge, mechanics, torque, vessel
 P: 542 Calculate the velocity of efflux from the curved pipe opening using Bernoulli's Theorem. This water-flow will form a force at the circular gate trying to push it outwards, therefore equal and opposite torque is needed to counteract the torque due to water flow. The force due to water flow is given by $dAv^2$ where d is the density of water .The torque will be the moment of this force about the hinge of the circular gate. BJ