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MapleSim Hydraulics Library from Modelon

Rigid Line  Losses of a rigid line as a function of Reynolds number

The RigidLine component describes the laminar/turbulent flow through a circular, smooth rigid line; that is, it  calculates the flow rate q as a function of pressure drop dp. There are two flow modes:

0 < Re < ReCrit

laminar (Hagen-Poiseuille)

ReCrit < Re

turbulent (Blasius)

The functions q = q(Re) and q = q(dp) are unique. The geometric volume of the lumped volumes at each port is computed from the parameters length and area. 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

LongLine

Long line with laminar flow

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

10

m

Line length

length

d

0.05

m

Line diameter

diameter

Constants

Name

Value

Units

Description

Modelica ID

ReCrit

2.32·103

1

Critical Reynolds number

ReCrit

See Also

Lines, LongLine, LongLine_u_air, MapleSim Hydraulics Library from Modelon Overview


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