Class PipeSection

java.lang.Object
neqsim.process.equipment.pipeline.twophasepipe.PipeSection
All Implemented Interfaces:
Serializable, Cloneable
Direct Known Subclasses:
TwoFluidSection
public class PipeSection extends Object implements Cloneable, Serializable
Represents the state of a single section/cell in the multiphase pipe.

Stores both conservative variables (for numerical integration) and primitive variables (for physical interpretation and closure relations).

Version:
1.0
Author:
Even Solbraa
See Also:

  • Field Details

    • serialVersionUID

      private static final long serialVersionUID
      See Also:

    • position

      private double position

    • length

      private double length

    • diameter

      private double diameter

    • area

      private double area

    • inclination

      private double inclination

    • elevation

      private double elevation

    • roughness

      private double roughness

    • pressure

      private double pressure

    • temperature

      private double temperature

    • gasHoldup

      private double gasHoldup

    • liquidHoldup

      private double liquidHoldup

    • gasVelocity

      private double gasVelocity

    • liquidVelocity

      private double liquidVelocity

    • gasDensity

      private double gasDensity

    • liquidDensity

      private double liquidDensity

    • gasViscosity

      private double gasViscosity

    • liquidViscosity

      private double liquidViscosity

    • gasSoundSpeed

      private double gasSoundSpeed

    • liquidSoundSpeed

      private double liquidSoundSpeed

    • surfaceTension

      private double surfaceTension

    • gasEnthalpy

      private double gasEnthalpy

    • liquidEnthalpy

      private double liquidEnthalpy

    • mixtureHeatCapacity

      private double mixtureHeatCapacity

    • flowRegime

      private PipeSection.FlowRegime flowRegime

    • mixtureVelocity

      private double mixtureVelocity

    • mixtureDensity

      private double mixtureDensity

    • superficialGasVelocity

      private double superficialGasVelocity

    • superficialLiquidVelocity

      private double superficialLiquidVelocity

    • liquidLevel

      private double liquidLevel

    • frictionPressureGradient

      private double frictionPressureGradient

    • gravityPressureGradient

      private double gravityPressureGradient

    • accumulatedLiquidVolume

      private double accumulatedLiquidVolume

    • isLowPoint

      private boolean isLowPoint

    • isHighPoint

      private boolean isHighPoint

    • isInSlugBody

      private boolean isInSlugBody

    • isInSlugBubble

      private boolean isInSlugBubble

    • slugHoldup

      private double slugHoldup

    • massTransferRate

      private double massTransferRate

  • Constructor Details

    • PipeSection

      public PipeSection()
      Default constructor.

    • PipeSection

      public PipeSection(double position, double length, double diameter, double inclination)
      Constructor with geometry.
      Parameters:
      position - Position from inlet (m)
      length - Segment length (m)
      diameter - Pipe diameter (m)
      inclination - Pipe inclination (radians)

  • Method Details

    • updateDerivedQuantities

      public void updateDerivedQuantities()
      Calculate derived quantities from primary variables.

    • calcLiquidLevelFromHoldup

      private double calcLiquidLevelFromHoldup(double holdup, double D)
      Calculate liquid level from holdup for circular pipe.
      Parameters:
      holdup - Liquid holdup (0-1)
      D - Diameter (m)
      Returns:
      Liquid level (m)

    • getConservativeVariables

      public double[] getConservativeVariables()
      Get conservative variables for numerical integration.
      Returns:
      Array [ρ_g * α_g, ρ_L * α_L, ρ_m * v_m, ρ_m * e]

    • setFromConservativeVariables

      public void setFromConservativeVariables(double[] U, double[] gasProps, double[] liqProps)
      Set state from conservative variables.
      Parameters:
      U - Conservative variables
      gasProps - Gas density and enthalpy
      liqProps - Liquid density and enthalpy

    • clone

      public PipeSection clone()
      Overrides:
      clone in class Object

    • getPosition

      public double getPosition()

    • setPosition

      public void setPosition(double position)

    • getLength

      public double getLength()

    • setLength

      public void setLength(double length)

    • getDiameter

      public double getDiameter()

    • setDiameter

      public void setDiameter(double diameter)

    • getArea

      public double getArea()

    • getInclination

      public double getInclination()

    • setInclination

      public void setInclination(double inclination)

    • getElevation

      public double getElevation()

    • setElevation

      public void setElevation(double elevation)

    • getRoughness

      public double getRoughness()

    • setRoughness

      public void setRoughness(double roughness)

    • getPressure

      public double getPressure()

    • setPressure

      public void setPressure(double pressure)

    • getTemperature

      public double getTemperature()

    • setTemperature

      public void setTemperature(double temperature)

    • getGasHoldup

      public double getGasHoldup()

    • setGasHoldup

      public void setGasHoldup(double gasHoldup)

    • getLiquidHoldup

      public double getLiquidHoldup()

    • getEffectiveLiquidHoldup

      public double getEffectiveLiquidHoldup()
      Get effective liquid holdup, considering slug overlay when in a slug.
      Returns:
      Effective liquid holdup (dimensionless, 0-1)

    • getEffectiveMixtureDensity

      public double getEffectiveMixtureDensity()
      Get effective mixture density, considering slug overlay when in a slug.
      Returns:
      Effective mixture density (kg/m³)

    • setLiquidHoldup

      public void setLiquidHoldup(double liquidHoldup)

    • getGasVelocity

      public double getGasVelocity()

    • setGasVelocity

      public void setGasVelocity(double gasVelocity)

    • getLiquidVelocity

      public double getLiquidVelocity()

    • setLiquidVelocity

      public void setLiquidVelocity(double liquidVelocity)

    • getGasDensity

      public double getGasDensity()

    • setGasDensity

      public void setGasDensity(double gasDensity)

    • getLiquidDensity

      public double getLiquidDensity()

    • setLiquidDensity

      public void setLiquidDensity(double liquidDensity)

    • getGasViscosity

      public double getGasViscosity()

    • setGasViscosity

      public void setGasViscosity(double gasViscosity)

    • getLiquidViscosity

      public double getLiquidViscosity()

    • setLiquidViscosity

      public void setLiquidViscosity(double liquidViscosity)

    • getGasSoundSpeed

      public double getGasSoundSpeed()

    • setGasSoundSpeed

      public void setGasSoundSpeed(double gasSoundSpeed)

    • getLiquidSoundSpeed

      public double getLiquidSoundSpeed()

    • setLiquidSoundSpeed

      public void setLiquidSoundSpeed(double liquidSoundSpeed)

    • getSurfaceTension

      public double getSurfaceTension()

    • setSurfaceTension

      public void setSurfaceTension(double surfaceTension)

    • getGasEnthalpy

      public double getGasEnthalpy()

    • setGasEnthalpy

      public void setGasEnthalpy(double gasEnthalpy)

    • getLiquidEnthalpy

      public double getLiquidEnthalpy()

    • setLiquidEnthalpy

      public void setLiquidEnthalpy(double liquidEnthalpy)

    • getMixtureHeatCapacity

      public double getMixtureHeatCapacity()

    • setMixtureHeatCapacity

      public void setMixtureHeatCapacity(double mixtureHeatCapacity)

    • getFlowRegime

      public PipeSection.FlowRegime getFlowRegime()

    • setFlowRegime

      public void setFlowRegime(PipeSection.FlowRegime flowRegime)

    • getMixtureVelocity

      public double getMixtureVelocity()

    • getMixtureDensity

      public double getMixtureDensity()

    • getSuperficialGasVelocity

      public double getSuperficialGasVelocity()

    • getSuperficialLiquidVelocity

      public double getSuperficialLiquidVelocity()

    • getLiquidLevel

      public double getLiquidLevel()

    • getFrictionPressureGradient

      public double getFrictionPressureGradient()

    • setFrictionPressureGradient

      public void setFrictionPressureGradient(double frictionPressureGradient)

    • getGravityPressureGradient

      public double getGravityPressureGradient()

    • setGravityPressureGradient

      public void setGravityPressureGradient(double gravityPressureGradient)

    • getAccumulatedLiquidVolume

      public double getAccumulatedLiquidVolume()

    • setAccumulatedLiquidVolume

      public void setAccumulatedLiquidVolume(double accumulatedLiquidVolume)

    • isLowPoint

      public boolean isLowPoint()

    • setLowPoint

      public void setLowPoint(boolean lowPoint)

    • isHighPoint

      public boolean isHighPoint()

    • setHighPoint

      public void setHighPoint(boolean highPoint)

    • isInSlugBody

      public boolean isInSlugBody()

    • setInSlugBody

      public void setInSlugBody(boolean inSlugBody)

    • isInSlugBubble

      public boolean isInSlugBubble()

    • setInSlugBubble

      public void setInSlugBubble(boolean inSlugBubble)

    • getSlugHoldup

      public double getSlugHoldup()

    • setSlugHoldup

      public void setSlugHoldup(double slugHoldup)

    • getMassTransferRate

      public double getMassTransferRate()

    • setMassTransferRate

      public void setMassTransferRate(double massTransferRate)

    • getWallisSoundSpeed

      public double getWallisSoundSpeed()
      Calculate Wallis mixture sound speed.
      Returns:
      Mixture sound speed (m/s)