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Restrictor, User
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):
- upstream cross section
.
- downstream cross section
.
- hydraulic diameter
defined by 
where 
is the area
of the smallest cross section and 
is the
perimeter of the smallest cross section.
- loss coefficient
.
- oil mass flow in the restrictor (only if the OIL parameter is used to define the kind of oil in the *FLUID SECTION 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.
guido dhondt 2012-10-06