RadialHeatTransfer Class Reference

Base class for heat transfer calculation with 1d radial models. More...

#include <radial.hpp>

Inheritance diagram for RadialHeatTransfer:

Public Member Functions
	RadialHeatTransfer (const double diameter, const PipeWall &pipeWall, const double burialDepth, const BurialMedium &burialMedium, const AmbientFluid &ambientFluid)
	Constructor that sets up the discretization of the pipe surroundings. More...
double	calculateOuterFilmCoefficient () const
	Calculate the outer film coefficient. Basically a wrapper around utils::calcOuterWallFilmCoefficient(const double, const AmbientFluid&) using the proper arguments. More...
virtual arma::uword	size () const
	The number of discretization elements.
virtual HeatTransferState	makeState (const double heatFlux) const override
	Make instance of HeatTransferState from heat flux. Override. More...
virtual HeatTransferState	makeState (const double heatFlux, const double gasTemperature, const double ambientTemperature) const override
	Make instance of HeatTransferState from heat flux. Override. More...
Public Member Functions inherited from HeatTransferBase
virtual	~HeatTransferBase ()
virtual HeatTransferState	evaluate (const HeatTransferState &current, const double timeStep, const double ambientTemperature, const double gasPressure, const double gasTemperature, const double gasReynoldsNumber, const double gasHeatCapacityConstantPressure, const double gasViscosity) const =0
	Evaluate heat transfer. More...

Protected Attributes
double	m_diameter
	Pipe inner diameter [m].
double	m_burialDepth
	Distance from top of pipe to top of burial medium [m].
BurialMedium	m_burialMedium
AmbientFluid	m_ambientFluid
	Description of the fluid surrounding the pipeline.
arma::vec	m_width
	Width of each discretization shell [m].
arma::vec	m_conductivity
	Thermal conductivity of each discretization shell [W/(m K)].
arma::vec	m_density
	Density of each discretization shell [kg/m3].
arma::vec	m_heatCapacity
	Heat capacity of each discretization shell ( \(c_p\)) [J/(kg K)].
arma::uvec	m_isBurialLayer
arma::vec	m_crossSection
	Area/cross-section of each shell [m2].
arma::vec	m_ri
	Inner radius [m].
arma::vec	m_ro
	Outer radius [m].

Detailed Description

Base class for heat transfer calculation with 1d radial models.

This contains the description of the burial medium, burial depth, ambient fluid etc., as well as the 1d radial discretization of the surroundings of the pipeline (in m_width, m_conductivity, etc.).

Constructor & Destructor Documentation

RadialHeatTransfer()

RadialHeatTransfer::RadialHeatTransfer	(	const double	diameter,
		const PipeWall &	pipeWall,
		const double	burialDepth,
		const BurialMedium &	burialMedium,
		const AmbientFluid &	ambientFluid
	)

Constructor that sets up the discretization of the pipe surroundings.

Parameters

diameter	Pipe inner diameter [m]
pipeWall	PipeWall instance
burialDepth	Distance from top of pipe to top of burial medium [m]
burialMedium	BurialMedium instance
ambientFluid	AmbientFluid instance

Member Function Documentation

calculateOuterFilmCoefficient()

double RadialHeatTransfer::calculateOuterFilmCoefficient

(

)

const

Calculate the outer film coefficient. Basically a wrapper around utils::calcOuterWallFilmCoefficient(const double, const AmbientFluid&) using the proper arguments.

Returns

Outer film coefficient [W/(m2 K)]

makeState() [1/2]

virtual HeatTransferState RadialHeatTransfer::makeState ( const double  heatFlux ) const

inlineoverridevirtual

Make instance of HeatTransferState from heat flux. Override.

Makes HeatTransferState instance with the correct temperature property for 1d radial heat transfer models.

Parameters

heatFlux

Heat flux [W/m2]

Returns

HeatTransferState instance with temperature.

Reimplemented from HeatTransferBase.

makeState() [2/2]

virtual HeatTransferState RadialHeatTransfer::makeState ( const double  heatFlux, const double  gasTemperature, const double  ambientTemperature  ) const

inlineoverridevirtual

Make instance of HeatTransferState from heat flux. Override.

Makes HeatTransferState instance with the correct temperature property for 1d radial heat transfer models. Performs a linear interpolation between gas temperature and ambient temperature. This could probably be improved upon, since there is likely an analytical solution.

Parameters

heatFlux	Heat flux [W/m2]
ambientTemperature	Ambient temperature [K]
gasTemperature	Gas temperature [K]

Returns

HeatTransferState instance with temperature.

Reimplemented from HeatTransferBase.

Member Data Documentation

m_burialMedium

BurialMedium RadialHeatTransfer::m_burialMedium

protected

Description of the medium the pipeline is buried in (or on top of/suspended above depending on burial depth).

m_isBurialLayer

arma::uvec RadialHeatTransfer::m_isBurialLayer

protected

Bool that determines whether the discretization layers are due to burial in the burial medium or not.

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The documentation for this class was generated from the following file:

• D:/Code/transient-pipeline-flow-gh-pages/src/heattransfer/radial.hpp