WOLFRAM SYSTEM MODELER

baseFun

Base class for valve characteristics

Wolfram Language

In[1]:=
SystemModel["Modelica.Fluid.Valves.BaseClasses.ValveCharacteristics.baseFun"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

This is a partial function that defines the interface of valve characteristics. The function returns "rc = valveCharacteristic" as function of the opening "pos" (in the range 0..1): 

    dp = (zeta_TOT/2) * rho * velocity^2
m_flow =    sqrt(2/zeta_TOT) * Av * sqrt(rho * dp)
m_flow = valveCharacteristic * Av * sqrt(rho * dp)
m_flow =                  rc * Av * sqrt(rho * dp)

Inputs (1)

pos

Type: Real

Description: Opening position (0: closed, 1: fully open)

Outputs (1)

rc

Type: Real

Description: Relative flow coefficient (per unit)

Extended by (4)

equalPercentage

Modelica.Fluid.Valves.BaseClasses.ValveCharacteristics

Equal percentage characteristic

quadratic

Modelica.Fluid.Valves.BaseClasses.ValveCharacteristics

Quadratic characteristic

one

Modelica.Fluid.Valves.BaseClasses.ValveCharacteristics

Constant characteristic

linear

Modelica.Fluid.Valves.BaseClasses.ValveCharacteristics

Linear characteristic