 
 
 
 
 
 
 
  
The geometry of an enlargement is shown in Figure 81. It is described by the following constants (to be specified in that order on the line beneath the *FLUID SECTION, TYPE=RESTRICTOR ENLARGEMENT card):
 .
.
 .
.
 defined by
 defined by  where
 where  is the
  perimeter of the cross section.
 is the
  perimeter of the cross section. 
The loss coefficient for an enlargement is taken from [33].
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: piperestrictor, restrictor, restrictor-oil.