SimpleExpansionContraction

Sudden Expansion / Contraction

    SimpleExpansionContraction

Library

HydraulicsByFluidon/Components/Lines/Base

Description

The component ExpansionContraction is a model of a cross section enlargement (diffusor) or a cross section reduction (nozzle). It depends on the flow direction.

The component computes the loss number zeta

according to the following equations:

Borda-Carnot Equation

Formulas are taken from E. Truckenbrodt, Fluidmechanik, Band 1: Grundlagen und elementare Strömungsvorgänge dichtebeständiger Fluide, 4. Auflage, 2008.

Parameters

SimpleExpansionContraction_0

NameLabelDescriptionData TypeValid Values

mo_D1

D1

Diameter 1

Scalar

mo_D2

D2

Diameter 2

Scalar

SimpleExpansionContraction_1

NameLabelDescriptionData TypeValid Values

mo_forwardFluidProperties

forwardFluidProperties

Forward fluid properties between ports

Scalar

true
false

SimpleExpansionContraction_2

NameLabelDescriptionData TypeValid Values

mo__nmodifiers

Number of Modifiers

Specifies the number of modifiers

Number

mo__modifiers

Modifiers

Add new modifier

Structure

mo__modifiers/varname

Variable name

Cell of strings

'volumeFlowA'
'volumeFlowB'
'fluidId'
'zeta'
'zetaoO'
'zetaOo'
'my'
'beta'
'A1'
'A2'
'signDp'
'pMax'
'dp'

mo__modifiers/attribute

Attribute

Cell of strings

'start'
'fixed'

mo__modifiers/value

Value

Ports

NameTypeDescriptionIO TypeNumber

fluidPortA

implicit

Hydraulic port A

input

1

fluidPortB

implicit

Hydraulic port B

input

2