steadystate.hpp

#pragma once
 
#include <armadillo>
 
#include "heattransfer/radial.hpp"
 
class Pipeline;
class PipeWall;
class BurialMedium;
class AmbientFluid;
 
class SteadyStateHeatTransfer : public RadialHeatTransfer
{
public:
    SteadyStateHeatTransfer(
            const double diameter,
            const PipeWall& pipeWall,
            const double burialDepth,
            const BurialMedium& burialMedium,
            const AmbientFluid& ambientFluid);
 
    SteadyStateHeatTransfer(
            const double diameter = 1.0,
            const double burialDepth = 1.0);
 
    virtual HeatTransferState evaluate(
            const HeatTransferState& current,
            const double timeStep,
            const double ambientTemperature,
            const double gasPressure,
            const double gasTemperature,
            const double gasReynoldsNumber,
            const double gasHeatCapacity,
            const double gasViscosity) const override;
 
    HeatTransferState evaluateInternal(
            const double ambientTemperature,
            const double gasPressure,
            const double gasTemperature,
            const double gasReynoldsNumber,
            const double gasHeatCapacity,
            const double gasViscosity) const;
 
    double calculateHeatTransferCoefficient(
            const double gasPressure,
            const double gasReynoldsNumber,
            const double gasHeatCapacityConstantPressure,
            const double gasViscosity) const;
 
    double getOverallHeatTransferCoefficient() const { return m_overallHeatTransferCoefficient; }
    double getOverallThermalResistance() const { return m_overallThermalResistance; }
 
private:
    double m_overallHeatTransferCoefficient;
 
    double m_overallThermalResistance;
};