PipeWithoutCapacity

    PipeWithoutCapacity

Library

Components/Lines

Description

Pipe model with resistive and inductive properties.

The pressure drop calculation is based on the assumption of quasi-steady friction. For turbulent flow through hydraulically rough pipes, the relative surface roughness (relRoughness) is taken into account. Geodetic pressure offset due to height differences between the pipe ports is considered in the simulation. The height difference deltaH is measured as the vertical distance between port B and port A of the pipe.

The calculated inductance depends on the flow regime (laminar or turbulent). The laminar inductance exceeds the turbulent one by a factor of 4/3.

If the parameter flowInitialization is activated, the initial mass flow rate will be calculated based on the potential difference between the two ports. If the check mark is not set, the initial flow rate will be zero even if a potential difference is present.

Please note: almost in every case it is necessary to add volumes at both ports.

Parameters

PipeWithoutCapacity_0

NameLabelDescriptionData TypeValid Values

mo_diameter

diameter

inner diameter

Scalar

mo_length

length

pipe length

Scalar

mo_deltaH

deltaH

height difference

Scalar

mo_relRoughness

relRoughness

inner surface relative roughness

Scalar

mo_area

area

Scalar

mo_fricConstant

fricConstant

Scalar

PipeWithoutCapacity_1

NameLabelDescriptionData TypeValid Values

mo_forwardFluidProperties

forwardFluidProperties

Forward fluid properties between ports

Scalar

true
false

PipeWithoutCapacity_2

NameLabelDescriptionData TypeValid Values

mo_volumeFlowA

volumeFlowA

volumeFlowA

Structure

mo_volumeFlowA/fixed

fixed

Cell of scalars

true
false

mo_volumeFlowA/start

start

Cell of scalars

mo_volumeFlowB

volumeFlowB

volumeFlowB

Structure

mo_volumeFlowB/fixed

fixed

Cell of scalars

true
false

mo_volumeFlowB/start

start

Cell of scalars

mo_reynoldsNo

reynoldsNo

reynoldsNo

Structure

mo_reynoldsNo/fixed

fixed

Cell of scalars

true
false

mo_reynoldsNo/start

start

Cell of scalars

mo_lambda

lambda

lambda

Structure

mo_lambda/fixed

fixed

Cell of scalars

true
false

mo_lambda/start

start

Cell of scalars

Ports

NameTypeDescriptionIO TypeNumber

fluidPortA

implicit

Hydraulic port A

input

1

fluidPortB

implicit

Hydraulic port B

input

2