EnthalpyDiscretizer Class Reference

Implementation of Discretizer for the enthalpy form of the energy equation. More...

#include <enthalpy.hpp>

Inheritance diagram for EnthalpyDiscretizer:

Public Member Functions
	EnthalpyDiscretizer (const arma::uword nGridPoints)
	Constructor. Calls Discretizer constructor with nEquations = 3. More...
virtual void	discretize (const arma::uword dt, const Pipeline &currentState, const Pipeline &newState) override
	Discretize implementation. Calculates the coefficients of the discretized governing equations, with the enthalpy form of the energy equation. More...
void	discretizeFromPrimitives (const arma::uword dt, const arma::vec &diameter, const arma::vec &height, const arma::vec &gridPoints, const arma::vec &currentSpecificGasConstant, const arma::vec &currentMassFlow, const arma::vec &currentPressure, const arma::vec &currentTemperature, const arma::vec &guessMassFlow, const arma::vec &guessPressure, const arma::vec &guessTemperature, const arma::vec &guessFriction, const arma::vec &guessHeatCapacityConstantPressure, const arma::vec &guessHeatFlux, const arma::vec &guessDensity, const arma::vec &guessCompressibilityFactor, const arma::vec &guess_dZdT_p, const arma::vec &guess_dZdp)
	Calculates the coefficients of the discretized governing equations, with the enthalpy form of the energy equation, and stores the result in Discretizer::m_term_i, Discretizer::m_term_ipp and Discretizer::m_boundaryTerm. More...
Public Member Functions inherited from Discretizer
virtual	~Discretizer ()
	Discretizer (const arma::uword nGridPoints, const arma::uword nEquationsAndVariables)
	Construct from number of grid points and number of equations and variables. More...
const arma::cube &	term_i () const
	Get coefficients of \(y_i\).
const arma::cube &	term_ipp () const
	Get coefficients of \(y_{i+1}\).
const arma::mat &	boundaryTerms () const
	Get constant terms.

Additional Inherited Members
Protected Attributes inherited from Discretizer
arma::cube	m_term_i
	The coefficients of \(y_i\) in the discretized governing equations. More...
arma::cube	m_term_ipp
	The coefficients of \(y_i\) in the discretized governing equations. More...
arma::mat	m_boundaryTerm
	The constant/known terms in the discretized governing equations. More...
double	m_gravity = 9.81
	Gravity.

Detailed Description

Implementation of Discretizer for the enthalpy form of the energy equation.

Constructor & Destructor Documentation

EnthalpyDiscretizer()

EnthalpyDiscretizer::EnthalpyDiscretizer ( const arma::uword  nGridPoints )

explicit

Constructor. Calls Discretizer constructor with nEquations = 3.

Parameters

nGridPoints

Number of grid points

Member Function Documentation

discretize()

virtual void EnthalpyDiscretizer::discretize ( const arma::uword  dt, const Pipeline &  currentState, const Pipeline &  newState  )

overridevirtual

Discretize implementation. Calculates the coefficients of the discretized governing equations, with the enthalpy form of the energy equation.

This is just a wrapper around discretizeFromPrimitives().

Parameters

dt	Time step [s]
currentState	Current pipeline state
newState	New/guess pipeline state

Implements Discretizer.

discretizeFromPrimitives()

void EnthalpyDiscretizer::discretizeFromPrimitives	(	const arma::uword	dt,
		const arma::vec &	diameter,
		const arma::vec &	height,
		const arma::vec &	gridPoints,
		const arma::vec &	currentSpecificGasConstant,
		const arma::vec &	currentMassFlow,
		const arma::vec &	currentPressure,
		const arma::vec &	currentTemperature,
		const arma::vec &	guessMassFlow,
		const arma::vec &	guessPressure,
		const arma::vec &	guessTemperature,
		const arma::vec &	guessFriction,
		const arma::vec &	guessHeatCapacityConstantPressure,
		const arma::vec &	guessHeatFlux,
		const arma::vec &	guessDensity,
		const arma::vec &	guessCompressibilityFactor,
		const arma::vec &	guess_dZdT_p,
		const arma::vec &	guess_dZdp
	)

Calculates the coefficients of the discretized governing equations, with the enthalpy form of the energy equation, and stores the result in Discretizer::m_term_i, Discretizer::m_term_ipp and Discretizer::m_boundaryTerm.

Parameters

dt	Time step [s]
diameter	Inner diameter [m]
height	Height profile [m]
gridPoints	Grid points [m]
currentSpecificGasConstant	Current specific gas constant \(R_{\rm specific}\) [J/(kg K)]
currentMassFlow	Current mass flow [kg/s]
currentPressure	Current pressure [Pa]
currentTemperature	Temperature [K]
guessMassFlow	New mass flow [kg/s]
guessPressure	New pressure [Pa]
guessTemperature	New temperature [K]
guessFriction	New friction factor [-]
guessHeatCapacityConstantPressure	New heat capacity \(c_p\) [J/(kg K)]
guessHeatFlux	New heat flux [W/m2]
guessDensity	New gas density [kg/m3]
guessCompressibilityFactor	New gas compressibility factor \(Z\) [-]
guess_dZdT_p	New partial derivative \(\frac{\partial Z}{\partial T}|_p\) [-]
guess_dZdp	New partial derivative \(\frac{\partial Z}{\partial p}|_T\) [-]

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

• D:/Code/transient-pipeline-flow-gh-pages/src/solver/discretizer/enthalpy.hpp