Pipe.h

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// SPDX-FileCopyrightText: Copyright (c) OpenGeoSys Community (opengeosys.org)
// SPDX-License-Identifier: BSD-3-Clause
 
#pragma once
 
#include <cmath>
#include <numbers>
 
namespace BaseLib
{
class ConfigTree;
}
namespace ProcessLib
{
namespace HeatTransportBHE
{
namespace BHE
{
struct Pipe
{
    double const diameter;
    double const wall_thickness;
    double const wall_thermal_conductivity;

    double area() const { return circleArea(diameter); }

    double outsideArea() const { return circleArea(outsideDiameter()); }
 
    double outsideDiameter() const { return diameter + 2 * wall_thickness; }
 
    double wallThermalResistance() const
    {
        double const outside_diameter = outsideDiameter();
 
        return std::log(outside_diameter / diameter) /
               (2.0 * std::numbers::pi * wall_thermal_conductivity);
    }
 
private:
    double circleArea(double const diameter) const
    {
        return std::numbers::pi * diameter * diameter / 4;
    }
};
 
inline double coaxialPipesAnnulusDiameter(Pipe const& inner_pipe,
                                          Pipe const& outer_pipe)
{
    return outer_pipe.diameter - inner_pipe.diameter -
           2 * inner_pipe.wall_thickness;
}
 
Pipe createPipe(BaseLib::ConfigTree const& config);
}  // namespace BHE
}  // namespace HeatTransportBHE
}  // namespace ProcessLib