dam_westergaard_condition_load_process.hpp

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//    |  /           |
//    ' /   __| _` | __|  _ \   __|
//    . \  |   (   | |   (   |\__ `
//   _|\_\_|  \__,_|\__|\___/ ____/
//                   Multi-Physics
//
//  License:         BSD License
//                   Kratos default license: kratos/license.txt
//
//  Main authors:    Lorenzo Gracia
//
//
#if !defined(KRATOS_DAM_WESTERGAARD_CONDITION_LOAD_PROCESS)
#define KRATOS_DAM_WESTERGAARD_CONDITION_LOAD_PROCESS
 
#include <cmath>
 
// Project includes
#include "includes/kratos_flags.h"
#include "includes/kratos_parameters.h"
#include "processes/process.h"
 
// Application include
#include "dam_application_variables.h"
 
namespace Kratos
{
 
class DamWestergaardConditionLoadProcess : public Process
{
 
  public:
    KRATOS_CLASS_POINTER_DEFINITION(DamWestergaardConditionLoadProcess);
 
    typedef Table<double, double> TableType;
 
    //----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 
    DamWestergaardConditionLoadProcess(ModelPart &rModelPart,
                                       Parameters &rParameters) : Process(Flags()), mrModelPart(rModelPart)
    {
        KRATOS_TRY
 
        //only include validation with c++11 since raw_literals do not exist in c++03
        Parameters default_parameters(R"(
            {
                "model_part_name":"PLEASE_CHOOSE_MODEL_PART_NAME",
                "variable_name": "PLEASE_PRESCRIBE_VARIABLE_NAME",
                "Modify"                                                : true,
                "Gravity_Direction"                                     : "Y",
                "Reservoir_Bottom_Coordinate_in_Gravity_Direction"      : 0.0,
                "Spe_weight"                                            : 0.0,
                "Water_level"                                           : 0.0,
                "Water_Table"                                           : 0,
                "Aceleration"                                           : 0.0,
                "Aceleration_Table"                                     : 0,
                "interval":[
                0.0,
                0.0
                ]
            }  )");
 
        // Some values need to be mandatorily prescribed since no meaningful default value exist. For this reason try accessing to them
        // So that an error is thrown if they don't exist
        rParameters["Reservoir_Bottom_Coordinate_in_Gravity_Direction"];
        rParameters["variable_name"];
        rParameters["model_part_name"];
 
        // Now validate agains defaults -- this also ensures no type mismatch
        rParameters.ValidateAndAssignDefaults(default_parameters);
 
        mVariableName = rParameters["variable_name"].GetString();
        mGravityDirection = rParameters["Gravity_Direction"].GetString();
        mReferenceCoordinate = rParameters["Reservoir_Bottom_Coordinate_in_Gravity_Direction"].GetDouble();
        mSpecific = rParameters["Spe_weight"].GetDouble();
        mWaterLevel = rParameters["Water_level"].GetDouble();
        mAcceleration = rParameters["Aceleration"].GetDouble();
 
        mTimeUnitConverter = mrModelPart.GetProcessInfo()[TIME_UNIT_CONVERTER];
        mTableIdWater = rParameters["Water_Table"].GetInt();
        mTableIdAcceleration = rParameters["Aceleration_Table"].GetInt();
 
        if (mTableIdWater != 0)
            mpTableWater = mrModelPart.pGetTable(mTableIdWater);
 
        if (mTableIdAcceleration != 0)
            mpTableAcceleration = mrModelPart.pGetTable(mTableIdAcceleration);
 
        KRATOS_CATCH("");
    }
 
 
    virtual ~DamWestergaardConditionLoadProcess() {}
 
    //----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 
    void Execute() override
    {
    }
 
    //----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 
    void ExecuteInitialize() override
    {
        KRATOS_TRY;
 
        const Variable<double>& var = KratosComponents<Variable<double>>::Get(mVariableName);
        const int nnodes = mrModelPart.GetMesh(0).Nodes().size();
        int direction;
        double pressure;
 
        if (mGravityDirection == "X")
            direction = 0;
        else if (mGravityDirection == "Y")
            direction = 1;
        else
            direction = 2;
 
        double unit_acceleration = mAcceleration / 9.81;
 
        if (nnodes != 0)
        {
            ModelPart::NodesContainerType::iterator it_begin = mrModelPart.GetMesh(0).NodesBegin();
 
#pragma omp parallel for
            for (int i = 0; i < nnodes; i++)
            {
                ModelPart::NodesContainerType::iterator it = it_begin + i;
 
                double y_water = mWaterLevel - (it->Coordinates()[direction]);
 
                if (y_water < 0.0)
                {
                    y_water = 0.0;
                }
 
                pressure = (mSpecific * (y_water)) + 0.875 * (unit_acceleration)*mSpecific * sqrt(y_water * (mWaterLevel - mReferenceCoordinate));
                it->FastGetSolutionStepValue(var) = pressure;
            }
        }
 
        KRATOS_CATCH("");
    }
 
    //----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 
    void ExecuteInitializeSolutionStep() override
    {
 
        KRATOS_TRY;
 
        const Variable<double>& var = KratosComponents<Variable<double>>::Get(mVariableName);
 
        // Getting the values of table in case that it exist
        if (mTableIdWater != 0)
        {
            double time = mrModelPart.GetProcessInfo()[TIME];
            time = time / mTimeUnitConverter;
            mWaterLevel = mpTableWater->GetValue(time);
        }
 
        if (mTableIdAcceleration != 0)
        {
            double time = mrModelPart.GetProcessInfo()[TIME];
            time = time / mTimeUnitConverter;
            mAcceleration = mpTableAcceleration->GetValue(time);
        }
 
        const int nnodes = mrModelPart.GetMesh(0).Nodes().size();
        int direction;
        double pressure;
 
        if (mGravityDirection == "X")
            direction = 0;
        else if (mGravityDirection == "Y")
            direction = 1;
        else
            direction = 2;
 
        double unit_acceleration = mAcceleration / 9.81;
 
        if (nnodes != 0)
        {
            ModelPart::NodesContainerType::iterator it_begin = mrModelPart.GetMesh(0).NodesBegin();
 
#pragma omp parallel for
            for (int i = 0; i < nnodes; i++)
            {
                ModelPart::NodesContainerType::iterator it = it_begin + i;
 
                double y_water = mWaterLevel - (it->Coordinates()[direction]);
 
                if (y_water < 0.0)
                {
                    y_water = 0.0;
                }
 
                // Hydrodynamics Westergaard effects just contribute when the acceleration goes in the upstream direction
                if (unit_acceleration < 0.0)
                {
                    pressure = (mSpecific * (y_water)) + 0.875 * (-1.0 * unit_acceleration) * mSpecific * sqrt(y_water * (mWaterLevel - mReferenceCoordinate));
                }
                else
                {
                    pressure = (mSpecific * (y_water));
                }
 
                if (pressure > 0.0)
                {
                    it->FastGetSolutionStepValue(var) = pressure;
                }
                else
                {
                    it->FastGetSolutionStepValue(var) = 0.0;
                }
            }
        }
 
        KRATOS_CATCH("");
    }
 
    std::string Info() const override
    {
        return "DamWestergaardConditionLoadProcess";
    }
 
    void PrintInfo(std::ostream &rOStream) const override
    {
        rOStream << "DamWestergaardConditionLoadProcess";
    }
 
    void PrintData(std::ostream &rOStream) const override
    {
    }
 
 
  protected:
 
    ModelPart &mrModelPart;
    std::string mVariableName;
    std::string mGravityDirection;
    double mReferenceCoordinate;
    double mSpecific;
    double mWaterLevel;
    double mAcceleration;
    double mTimeUnitConverter;
    TableType::Pointer mpTableWater;
    TableType::Pointer mpTableAcceleration;
    int mTableIdWater;
    int mTableIdAcceleration;
 
    //----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 
  private:
    DamWestergaardConditionLoadProcess &operator=(DamWestergaardConditionLoadProcess const &rOther);
 
}; //Class
 
inline std::istream &operator>>(std::istream &rIStream,
                                DamWestergaardConditionLoadProcess &rThis);
 
inline std::ostream &operator<<(std::ostream &rOStream,
                                const DamWestergaardConditionLoadProcess &rThis)
{
    rThis.PrintInfo(rOStream);
    rOStream << std::endl;
    rThis.PrintData(rOStream);
 
    return rOStream;
}
 
} /* namespace Kratos.*/
 
#endif /* KRATOS_DAM_WESTERGAARD_CONDITION_LOAD_PROCESS defined */