Hydraulic System Properties
Generic fluid properties reference model for the hydraulic system
Description
Fluid Parameters
Global Settings
Summary Variables
The Hydraulic System Properties component defines the properties of a hydraulic fluid as well as global settings for the hydraulic system.
In the model workspace, place this component at the same level as the hydraulic components or subsystem to which you want to assign the hydraulic fluid properties. For example, if you place this component at the top level of the model, the hydraulic fluid properties will apply to all of the hydraulic components and subsystems in your model. If you place this component within a subsystem, the hydraulic fluid properties defined in the component will apply to the hydraulic components in that subsystem only and all nested subsystems.
Name
Default
Units
Modelica ID
ρ
850
kgm3
Density
rhoFluid
K
8·108
Pa
Bulk modulus
ElFluid
ν
1.8·10−5
m2s
Kinematic viscosity
nuFluid
The global settings patm and Amin are used by some components to set the value of the atmospheric pressure and the minimum allowable orifice area. As with the fluid parameters, these settings apply to all hydraulic components at the same or lower level in a subsystem hierarchy.
patm
101325
Atmospheric pressure
Amin
1·10−12
m2
Minimum orifice area
These parameters set the units used by the internal summary variables. See Hydraulic Summary Variables.
Summary pressure unit
kPa
Unit for internal pressure
pressUnitSummary
Summary flow rate unit
liters
Unit for internal flow rate
flowUnitSummary
See Also
Hydraulic Reference Components
Hydraulics Library
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