The geometry of an enlargement is shown in Figure 58. It is described by the following constants (to be specified in that order on the line beneath the *FLUID SECTION, TYPE=RESTRICTOR ENLARGEMENT card):
The loss coefficient for an enlargement 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.
Example files: piperestrictor, restrictor, restrictor-oil.