There is a numerical constant called the Orifice Coefficient of Flow or

Coefficient of Discharge, used in calculating fluid flow efficiency through a constriction.

Evaluation of the

coefficient of discharge is helpful in predicting the pressure losses across the orifice.

Som, "Numerical prediction of air core diameter,

coefficient of discharge and spray cone angle of a swirl spray pressure nozzle," International Journal of Heat and Fluid Flow, vol.

[A.sub.L] = [Q.sub.r] [square root of ([rho]/2[DELTA][P.sub.r]/[C.sub.d])] (2)

Coefficient of DischargeOrifice metering relies on the Reynolds Law of Similarity to predict the meter's

coefficient of discharge and control its measurement accuracy (Figure 1).

Effect of Number and Thickness of Vortex breaker on the

coefficient of discharge in shaft spillway, National Conference of Water, Soil, Plant Science and Agricultural Machinery in IAU Dezful Branch.

[7] investigated the

coefficient of discharge for a combined rectangular weir and semi-circular gate.

where: [Q.sub.gate] = discharge (spillway gate flow); [C.sub.d] =

coefficient of discharge, typically 0.5-0.7; w = vertical opening of gate; B = gate width; g = gravitational constant; and H = a head term.

In addition, the HBX does not need black box or signal conditioning due to linear

coefficient of discharge;

The filling patterns of various aluminum gating systems for sand casting recently were investigated by observing both water modeling and molten aluminum via a new video capturing technique, allowing each systems'

coefficient of discharge to be measured.

The

coefficient of discharge of the melt from the skull crucible in relation to the powder plasma arc is shown in Fig.