ABSTRACT
As an introduction to the use of numerical interpolation consider the calibration of
an orifice plate, a common device for measuring flow in pipes. It fits into a pipe
between a pair of flanges and, by constricting the flow and generating turbulence,
leads to a drop in pressure that can be measured by reading the pressure head
upstream and downstream of the plate. A plate, and a pipe with a plate fitted are
shown in Figure 8.1.