Properties: adiabatic, not isentropic, directional, inlet based restrictor if A_1 < A_2 and outlet based restrictor if A_2 < A_1.
A user-defined restrictor is described by the following constants (to be specified in that order on the line beneath the *FLUID SECTION, TYPE=RESTRICTOR USER card):
By specifying the parameter LIQUID on the *FLUID SECTION card the loss is calculated for liquids. In the absence of this parameter, compressible losses are calculated.
Example files: restrictor, restrictor-oil.