test_propagators_00001.cpp

Example of scalar and vector field propagation on homogeneous hexa volume mesh.Using: PropagateScalarField, PropagateVectorField

To run: ./test_propagators_00001
visit: mimmo website

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 *  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 *  License for more details.
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#include "mimmo_propagators.hpp"
 
 
// =================================================================================== //
// =================================================================================== //
 
mimmo::MimmoSharedPointer<mimmo::MimmoObject> createTestVolumeMesh(std::vector<long> &bcdir1_vertlist, std::vector<long> &bcdir2_vertlist){
 
    std::array<double,3> center({{0.0,0.0,0.0}});
    double radiusin(2.0), radiusout(5.0);
    double azimuthin(0.0), azimuthout(0.5*BITPIT_PI);
    double heightbottom(-1.0), heighttop(1.0);
    int nr(6), nt(10), nh(6);
 
    double deltar = (radiusout - radiusin)/ double(nr);
    double deltat = (azimuthout - azimuthin)/ double(nt);
    double deltah = (heighttop - heightbottom)/ double(nh);
 
    std::vector<std::array<double,3> > verts ((nr+1)*(nt+1)*(nh+1));
 
    int counter = 0;
    for(int k=0; k<=nh; ++k){
        for(int j=0; j<=nt; ++j){
            for(int i=0; i<=nr; ++i){
                verts[counter][0] =(radiusin + i*deltar)*std::cos(azimuthin + j*deltat);
                verts[counter][1] =(radiusin + i*deltar)*std::sin(azimuthin + j*deltat);
                verts[counter][2] =(heightbottom + k*deltah);
                ++counter;
            }
        }
    }
 
    //create the volume mesh mimmo.
    mimmo::MimmoSharedPointer<mimmo::MimmoObject> mesh(new mimmo::MimmoObject(2));
    mesh->getPatch()->reserveVertices((nr+1)*(nt+1)*(nh+1));
 
    //pump up the vertices
    for(const auto & vertex : verts){
        mesh->addVertex(vertex); //automatic id assigned to vertices.
    }
    mesh->getPatch()->reserveCells(nr*nt*nh);
 
    //create connectivities for hexa elements
    std::vector<long> conn(8,0);
    for(int k=0; k<nh; ++k){
        for(int j=0; j<nt; ++j){
            for(int i=0; i<nr; ++i){
                conn[0] = (nr+1)*(nt+1)*k + (nr+1)*j + i;
                conn[1] = (nr+1)*(nt+1)*k + (nr+1)*j + i+1;
                conn[2] = (nr+1)*(nt+1)*k + (nr+1)*(j+1) + i+1;
                conn[3] = (nr+1)*(nt+1)*k + (nr+1)*(j+1) + i;
                conn[4] = (nr+1)*(nt+1)*(k+1) + (nr+1)*j + i;
                conn[5] = (nr+1)*(nt+1)*(k+1) + (nr+1)*j + i+1;
                conn[6] = (nr+1)*(nt+1)*(k+1) + (nr+1)*(j+1) + i+1;
                conn[7] = (nr+1)*(nt+1)*(k+1) + (nr+1)*(j+1) + i;
                mesh->addConnectedCell(conn, bitpit::ElementType::HEXAHEDRON);
            }
        }
    }
 
    mesh->updateAdjacencies();
    mesh->updateInterfaces();
    mesh->update();
 
    bcdir1_vertlist.clear();
    bcdir2_vertlist.clear();
    bcdir1_vertlist.reserve(mesh->getNVertices());
    bcdir2_vertlist.reserve(mesh->getNVertices());
 
    for(int k=0; k<=nh; ++k){
        for(int i=0; i<=nr; ++i){
            bcdir1_vertlist.push_back((nr+1)*(nt+1)*k + i);
            bcdir2_vertlist.push_back((nr+1)*(nt+1)*k + (nr+1)*nt + i);
        }
    }
 
    return mesh;
}
 
 
// =================================================================================== //
 
/*
    Testing scalar and vector field propagation.
*/
int test1() {
 
    std::vector<long> bc1list, bc2list;
    mimmo::MimmoSharedPointer<mimmo::MimmoObject> mesh = createTestVolumeMesh(bc1list, bc2list);
    //serial test.
    livector1D cellInterfaceList1 = mesh->getInterfaceFromVertexList(bc1list, true, true);
    livector1D cellInterfaceList2 = mesh->getInterfaceFromVertexList(bc2list, true, true);
 
    //create the portion of boundary mesh carrying Dirichlet conditions
    mimmo::MimmoSharedPointer<mimmo::MimmoObject> bdirMesh(new mimmo::MimmoObject(1));
    bdirMesh->getPatch()->reserveVertices(bc1list.size()+bc2list.size());
    bdirMesh->getPatch()->reserveCells(cellInterfaceList1.size()+cellInterfaceList2.size());
 
    for(auto & val : bc1list){
        bdirMesh->addVertex(mesh->getVertexCoords(val), val);
    }
    for(auto & val : bc2list){
        bdirMesh->addVertex(mesh->getVertexCoords(val), val);
    }
    for(auto & val : cellInterfaceList1){
        int sizeconn =mesh->getInterfaces().at(val).getConnectSize();
        long * conn = mesh->getInterfaces().at(val).getConnect();
        bdirMesh->addConnectedCell(std::vector<long>(&conn[0], &conn[sizeconn]),
                                    bitpit::ElementType::QUAD, val);
    }
    for(auto & val : cellInterfaceList2){
        int sizeconn =mesh->getInterfaces().at(val).getConnectSize();
        long * conn = mesh->getInterfaces().at(val).getConnect();
        bdirMesh->addConnectedCell(std::vector<long>(&conn[0], &conn[sizeconn]),
                                    bitpit::ElementType::QUAD, val);
    }
 
    bdirMesh->updateAdjacencies();
    bdirMesh->update();
 
    bool check = false;
    long targetNode =  (10 +1)*(6+1)*3 + (6+1)*5 + 3;
 
//TESTING THE SCALAR PROPAGATOR //////
    // and the scalar field of Dirichlet values on its nodes.
    mimmo::MimmoPiercedVector<double> bc_surf_field;
    bc_surf_field.setGeometry(bdirMesh);
    bc_surf_field.setDataLocation(mimmo::MPVLocation::POINT);
    bc_surf_field.reserve(bdirMesh->getNVertices());
    for(auto & val : bc1list){
        bc_surf_field.insert(val, 10.0);
    }
    for(auto & val : bc2list){
        bc_surf_field.insert(val, 0.0);
    }
 
    // Now create a PropagateScalarField and solve the laplacian.
    mimmo::PropagateScalarField * prop = new mimmo::PropagateScalarField();
    prop->setName("test00001_PropagateScalarField");
    prop->setGeometry(mesh);
    prop->addDirichletBoundaryPatch(bdirMesh);
    prop->addDirichletConditions(&bc_surf_field);
    prop->setDamping(false);
    prop->setPlotInExecution(true);
 
    mesh->getPatch()->write("mesh");
 
    prop->exec();
 
    auto values = prop->getPropagatedField();
 
    check = check || (std::abs(values->at(targetNode)-5.0) > 1.0E-6);
 
//TESTING THE VECTOR PROPAGATOR //////
    // and the scalar field of Dirichlet values on its nodes.
    mimmo::MimmoPiercedVector<std::array<double,3>> bc_surf_3Dfield;
    bc_surf_3Dfield.setGeometry(bdirMesh);
    bc_surf_3Dfield.setDataLocation(mimmo::MPVLocation::POINT);
    bc_surf_3Dfield.reserve(bdirMesh->getNVertices());
    for(auto & val : bc1list){
        bc_surf_3Dfield.insert(val, {{10.0, 7.0, -4.0}});
    }
    for(auto & val : bc2list){
        bc_surf_3Dfield.insert(val, {{0.0,0.0,0.0}});
    }
 
    // Now create a PropagateScalarField and solve the laplacian.
    mimmo::PropagateVectorField * prop3D = new mimmo::PropagateVectorField();
    prop3D->setName("test00001_PropagateVectorField");
    prop3D->setGeometry(mesh);
    prop3D->addDirichletBoundaryPatch(bdirMesh);
    prop3D->addDirichletConditions(&bc_surf_3Dfield);
    prop3D->setDamping(true);
    prop3D->setDampingType(1);
    prop3D->setDampingDecayFactor(1.0);
    prop3D->setDampingInnerDistance(0.5);
    prop3D->setDampingOuterDistance(3.5);
 
    prop3D->setPlotInExecution(true);
 
    prop3D->exec();
 
    auto values3D = prop3D->getPropagatedField();
    check = check || (norm2(values3D->at(targetNode)-std::array<double,3>({{5.0,3.5,-2.0}})) > 1.0E-6);
 
    delete prop3D;
    delete prop;
 
    return check;
}
 
// =================================================================================== //
 
int main( int argc, char *argv[] ) {
 
    BITPIT_UNUSED(argc);
    BITPIT_UNUSED(argv);
 
#if MIMMO_ENABLE_MPI
    MPI_Init(&argc, &argv);
#endif
 
        int val = 1;
        try{
            val = test1() ;
        }
        catch(std::exception & e){
            std::cout<<"test_propagators_00001 exited with an error of type : "<<e.what()<<std::endl;
            return 1;
        }
#if MIMMO_ENABLE_MPI
    MPI_Finalize();
#endif
 
    return val;
}