What is Orifice??
An orifice is an opening, usually circular, in the side or base of a tank or reservoir,
through which fluid is discharged in the form of a jet, usually into the atmosphere.
The volume rate of flow discharged through an orifice will depend upon
the head of the fluid above the level of the orifice and it can, therefore, be
used as a means of flow measurement.
• Discharge depends on the Head ‘H’, size, shape and form of orifice.
• Usually sharped edge to reduce friction
Whenever there’s discharge through the orifice, the streamlines converge
at a particular section which is termed as vena contracta. This
contraction depends on head, shape and size of orifice.