the velocity of a fluid expressed in terms of the head or static pressure required to produce that velocity. It equals ρν/2 where ρ is the density of the fluid and ν is the velocity. In hydrology the density of water can be written 1/G where G is the gravitational constant
velocity head in Chemical Engineering
(vəlɒsɪti hɛd)
noun
(Chemical Engineering: Fluids storage and transport)
Velocity head is the pressure which is needed to increase the speed at which a liquid flows.
Due to an increase in velocity head, there is a drop in pressure head, causing a partial vacuum in the suction chamber.
A certain amount of energy must be expended to make the water in the suction pipestart moving, and this is called the velocity head.
Velocity head is the pressure which is needed to increase the speed at which a liquid flows.