Next: Restrictor, Exit Up: Fluid Section Types: Gases Previous: Restrictor, Wall Orifice Contents
Restrictor, Entrance
An entrance element is used to model the entry from a large chamber into a gas
pipe. For an entrance the value of 
is 0.5. It is described by the following constants (to be specified in that order on
the line beneath the *FLUID SECTION, TYPE=RESTRICTOR
ENTRANCE card):
- cross section of the entrance
.
- hydraulic diameter
defined by 
where 
is the
perimeter of the cross section.
- 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.
guido dhondt 2011-03-26