Laminate.H

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//
// Create a single laminate with specified orientation, thickness, and offset.
//
 
#ifndef IC_LAMINATE_H_
#define IC_LAMINATE_H_
 
#include "IC/IC.H"
#include "Util/Util.H"
#include "IO/ParmParse.H"
 
/// \class Laminate
/// \brief Initialize Laminates in a matrix
namespace IC
{
class Laminate: public IC
{
public:
    static constexpr const char* name = "laminate";
    enum Mollifier { Dirac, Gaussian };
 
    Laminate(amrex::Vector<amrex::Geometry>& _geom): IC(_geom) {}
    Laminate(amrex::Vector<amrex::Geometry>& _geom, IO::ParmParse& pp, std::string name): IC(_geom)
    {        
        pp_queryclass(name, *this);
    }
 
    void Add(const int& lev, Set::Field<Set::Scalar>& a_field, Set::Scalar)
    {
        for (amrex::MFIter mfi(*a_field[lev], amrex::TilingIfNotGPU()); mfi.isValid(); ++mfi)
        {
            amrex::Box bx = mfi.tilebox();
            bx.grow(a_field[lev]->nGrow());
            amrex::IndexType type = a_field[lev]->ixType();
 
            amrex::Array4<Set::Scalar> const& field = a_field[lev]->array(mfi);
            amrex::ParallelFor(bx, [=] AMREX_GPU_DEVICE(int i, int j, int k) {
 
                Set::Vector x = Set::Position(i, j, k, geom[lev], type);
 
                // The base matrix is always field(i,j,k,0)
                // Inclusions start with field(i,j,k,1)
 
                if (!singlefab)
                {
                    Set::Scalar value = 0.0;
                    for (int m = 0; m < number_of_inclusions; m++)
                    {
                        Set::Scalar t = std::abs((x - center[m]).transpose() * orientation[m]) - (thickness[m] / 2.0);
                        field(i, j, k, m + 1) = 0.5 - 0.5 * std::erf(t / eps[m]);
                        if (field(i, j, k, m + 1) < 0.) field(i, j, k, m + 1) = 0.;
                        if (field(i, j, k, m + 1) > 1.) field(i, j, k, m + 1) = 1.;
                        value += field(i, j, k, m + 1);
                    }
                    field(i, j, k, 0) = 1.0 - value;
                    if (field(i, j, k, 0) < 0.) field(i, j, k, 0) = 0.;
                    if (field(i, j, k, 0) > 1.) field(i, j, k, 0) = 1.;
                }
                else
                {
                    Set::Scalar t = std::abs((x - center[0]).transpose() * orientation[0]) - (thickness[0] / 2.0);
                    field(i, j, k, 0) = 0.5 - 0.5 * std::erf(t / eps[0]);
                    if (invert) field(i, j, k, 0) = 1.0 - field(i, j, k, 0);
                }
            });
        }
        a_field[lev]->FillBoundary();
    };
 
private:
    int number_of_inclusions = -1;
    amrex::Vector<Set::Vector> center;
    amrex::Vector<Set::Vector> orientation;
    amrex::Vector<Set::Vector> normal;
    amrex::Vector<Set::Scalar> eps;
    amrex::Vector<Set::Scalar> thickness;
    Mollifier moll = Mollifier::Gaussian;
    bool singlefab = false;
    bool invert = false;
 
public:
    static void Parse(Laminate& value, IO::ParmParse& pp)
    {
        // How many laminates (MUST be greater than or equal to 1).
        pp_query_default("number_of_inclusions", value.number_of_inclusions, 1);
 
        if (value.number_of_inclusions < 1)
            Util::Abort(INFO, "Number of inclusions must be at least 1. Aborting.");
 
        amrex::Vector<Set::Scalar> a_center;
        // (x,y,[z]) values for the center point of the laminate
        if (pp.contains("center")) pp_queryarr("center", a_center);
 
        if (a_center.size() != value.number_of_inclusions * AMREX_SPACEDIM) value.center.push_back(Set::Vector::Zero());
        else
        {
            for (int i = 0; i < a_center.size(); i += AMREX_SPACEDIM)
                value.center.push_back(Set::Vector(AMREX_D_DECL(a_center[i], a_center[i + 1], a_center[i + 2])));
        }
 
        amrex::Vector<Set::Scalar> a_thickness;
        // thickness of the laminate
        if (pp.contains("thickness")) pp_queryarr("thickness", a_thickness);
 
        if (a_thickness.size() != value.number_of_inclusions && a_thickness.size() != 1)
            Util::Abort(INFO, "Thickness of each inclusion must be specified");
 
        if (a_thickness.size() == 1)
        {
            if (a_thickness[0] <= 0.0) Util::Abort(INFO, "Invalid value of inclusion thickness");
            for (int i = 0; i < value.number_of_inclusions; i++) value.thickness.push_back(a_thickness[0]);
        }
 
        else
        {
            for (int i = 0; i < value.number_of_inclusions; i++)
            {
                if (a_thickness[i] <= 0.0) Util::Abort(INFO, "Invalid value of inclusion ", i + 1, " thickness");
                value.thickness.push_back(a_thickness[i]);
            }
        }
 
        amrex::Vector<Set::Scalar> a_orientation;
        // Vector normal to the interface of the laminate
        pp_queryarr("orientation", a_orientation);
 
        if (a_orientation.size() != value.number_of_inclusions * AMREX_SPACEDIM && a_orientation.size() != AMREX_SPACEDIM)
            Util::Abort(INFO, "Orientation of each inclusion must be specified");
 
        if (a_orientation.size() == AMREX_SPACEDIM)
            for (int i = 0; i < value.number_of_inclusions; i++)
                value.orientation.push_back(Set::Vector(AMREX_D_DECL(a_orientation[0], a_orientation[1], a_orientation[2])));
 
        else
            for (int i = 0; i < a_orientation.size(); i += AMREX_SPACEDIM)
                value.orientation.push_back(Set::Vector(AMREX_D_DECL(a_orientation[i], a_orientation[i + 1], a_orientation[i + 2])));
 
        for (int i = 0; i < value.orientation.size(); i++)
            if (value.orientation[i].lpNorm<2>() <= 0.) value.orientation[i] = Set::Vector::Random();
 
        for (int i = 0; i < value.orientation.size(); i++)
            value.orientation[i] = value.orientation[i] / value.orientation[i].lpNorm<2>();
 
        value.normal.resize(value.number_of_inclusions);
        for (int i = 0; i < value.orientation.size(); i++)
        {
            value.normal[i] = Set::Vector::Zero();
            if (value.orientation[i](0) != 0.)
            {
                AMREX_D_TERM(value.normal[i](0) = 1.;, value.normal[i](1) = 1.;, value.normal[i](2) = 1.;);
                value.normal[i](0) = -(AMREX_D_TERM(0., +value.orientation[i](1), +value.orientation[i](2))) / value.orientation[i](0);
                value.normal[i] = value.normal[i] / value.normal[i].lpNorm<2>();
            }
            else if (value.orientation[i](1) != 0.)
            {
                AMREX_D_TERM(value.normal[i](0) = 1.;, value.normal[i](1) = 1.;, value.normal[i](2) = 1.;);
                value.normal[i](1) = -(AMREX_D_TERM(value.orientation[i](0), +0.0, +value.orientation[i](2))) / value.orientation[i](1);
                value.normal[i] = value.normal[i] / value.normal[i].lpNorm<2>();
            }
        }
 
        amrex::Vector<Set::Scalar> a_eps;
        // Diffuse thickness
        pp_queryarr("eps", a_eps);
 
        if (a_eps.size() < 1)
            for (int i = 0; i < value.number_of_inclusions; i++)
                value.eps.push_back(1.e-5);
        if (a_eps.size() == 1)
        {
            if (a_eps[0] < 0.0)
            {
                Util::Warning(INFO, "Invalid value of laminate.eps. Resetting to 1e-5");
                a_eps[0] = 1.e-5;
            }
            for (int i = 0; i < value.number_of_inclusions; i++)
                value.eps.push_back(a_eps[0]);
        }
        else
        {
            for (int i = 0; i < value.number_of_inclusions; i++)
                value.eps.push_back(a_eps[i]);
        }
 
        std::string mollifier;
        pp_query("mollifier", mollifier); // Type of mollifer to use (options: dirac, [gaussian])
        if (mollifier == "Dirac" || mollifier == "dirac")
            value.moll = Mollifier::Dirac;
        else
            value.moll = Mollifier::Gaussian;
 
        // Switch to mode where only one component is used.
        pp_query("singlefab", value.singlefab);
 
        // Take the complement of the laminate
        pp_query("invert", value.invert);
    }
};
}
#endif