The geometry of an wall orifice is shown in Figure 61. It is described by the following constants (to be specified in that order on the line beneath the *FLUID SECTION, TYPE=RESTRICTOR WALL ORIFICE card):
The loss coefficient for a wall orifice is taken from [27].
By specifying the parameter LIQUID on the *FLUID SECTION card the loss is calculated for liquids. In the absense of this parameter, compressible losses are calculated.