When a fluid passes through a constriction, such as through a sharp-edged hole or
over a weir, the constriction contracts the fluid stream, so it is not uniform and
parallel. This contraction can continue some distance downstream of the constriction.
The contraction reduces the overall flow, which means that you must understand and
allow for it in any calculations you make for flow through the nozzle or orifice.
The TecQuipment Flow Through an Orifice (H4) fits onto either of TecQuipment’s
Hydraulic Benches. It allows students to experiment with flow, coefficients and
contraction of a vertical jet of water passing through a sharp-edged circular orifice.
TecQuipment also offer two different sets of optional nozzles and orifices for use this
equipment.