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MapleSim Hydraulics Library from Modelon

Lam Res  Resistance with laminar flow and volumes at the ports

The Lam Res component describes the laminar flow through a resistance. The pressure drop is modeled as in the component Lam Res No States. Volumes may be added at the ports. Use the modifier(s)

VolumeA(port_A(p(start=1e5,fixed=true)))

and/or

VolumeB(port_A(p(start=1e5,fixed=true)))

to set the initial condition(s) for the pressure of the lumped volume(s) [Pa].

Related Components

Name

Description

Orifice

Recommended component. The component, based on the loss coefficient K, describes both flow regimes: laminar for very small Reynolds numbers and turbulent for higher Reynolds numbers (default model).

Ori Poly

The component describes both flow regimes, using an interpolation polynomial.

Ori Cav

Orifice component checking for cavitation.

Sim Ori

Simple textbook component, using a constant discharge coefficient. It is valid for turbulent flow only; severe numerical problems for laminar flow.

Metering Ori

Metering Orifice (that is, component Orifice No States with variable diameter).

Two Orifices

Two orifices in series, one with variable the other with fixed flow area.

Connections

Name

Description

Modelica ID

portA

Layout of port where oil flows into an element (0<mflow, pB<pA means 0<&Delta;p)

port_A

portB

Hydraulic port where oil leaves the component (mflow<0, pB<pA means 0<&Delta;p)

port_B

oil

 

oil

Parameters

Name

Default

Units

Description

Modelica ID

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

use volume A

true

 

If true, a volume is present at port_A

useVolumeA

use volume B

true

 

If true, a volume is present at port_B

useVolumeB

VA

10-6

m3

Geometric volume at port A

volumeA

VB

10-6

m3

Geometric volume at port B

volumeB

G

4.2·10-13

m3sPa

Conductance of laminar resistance

G

See Also

Lam Res No States, Metering Ori, Ori Cav, Ori Poly, Orifice, Orifice No States, Restrictions, Sim Ori, Two Orifices, MapleSim Hydraulics Library from Modelon Overview


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