iocgns_example_00001.cpp

Morphing of a CGNS volume mesh, following step are performed:

• reading a CGNS volume mesh
• boundary extraction
• definition of a surface deformation on boundaries
• propagation of deformation field from boundaries to volume mesh bulk
• application of deformation to volume mesh
• write deformed mesh to CGNS file

Using: IOCGNS, SelectionByPID, SelectionByBox, RotationGeometry, ReconstructVector PropagateVectorField, ExtractVectorField, Apply, Chain, Partition(MPI version)

Depends on mimmo optional modules: iocgns, geohandlers, propagators

To run : ./iocgns_example_00001
To run (MPI version): mpirun -np X iocgns_example_00001
visit: mimmo website

/*---------------------------------------------------------------------------*\
 *
 *  mimmo
 *
 *  Copyright (C) 2015-2021 OPTIMAD engineering Srl
 *
 *  -------------------------------------------------------------------------
 *  License
 *  This file is part of mimmo.
 *
 *  mimmo is free software: you can redistribute it and/or modify it
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 *  as published by the Free Software Foundation.
 *
 *  mimmo is distributed in the hope that it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 *  License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with mimmo. If not, see <http://www.gnu.org/licenses/>.
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#include "mimmo_iocgns.hpp"
#include "mimmo_geohandlers.hpp"
#include "mimmo_manipulators.hpp"
#include "mimmo_propagators.hpp"
#if MIMMO_ENABLE_MPI
#include "mimmo_parallel.hpp"
#endif
 
// =================================================================================== //
 
void example00001() {
 
    /* Create IOCGNS object to import cgns input file. Bulk volume and its boundary
       meshes will be available.
    */
    mimmo::IOCGNS * cgnsI = new mimmo::IOCGNS(mimmo::IOCGNS::IOCGNS_Mode::READ);
    cgnsI->setDir("geodata");
    cgnsI->setFilename("grid");
    cgnsI->setTolerance(1.0e-12);
 
    /* Create IOCGNS object to export deformed volume mesh and its boundary to a cgns file. */
    mimmo::IOCGNS * cgnsO = new mimmo::IOCGNS(mimmo::IOCGNS::IOCGNS_Mode::WRITE);
    cgnsO->setDir(".");
    cgnsO->setFilename("iocgns_output_00001");
 
#if MIMMO_ENABLE_MPI
 
    /*
        Distribute the target compound of volume/boundary meshes among processes.
        Plot Optional results during execution active for Partition block.
     */
    mimmo::Partition *partition = new mimmo::Partition();
    partition->setPartitionMethod(mimmo::PartitionMethod::PARTGEOM);
    partition->setPlotInExecution(true);
 
    /*
        Serialize the distributed target compound volume/boundary meshes
        right before writing it in a cgns file.
     */
    mimmo::Partition *serialize = new mimmo::Partition();
    serialize->setPartitionMethod(mimmo::PartitionMethod::SERIALIZE);
    serialize->setPlotInExecution(true);
#endif
 
    /*
      Select and extract from target boundary mesh the compound of PID = 1,2
      (Wing wall and outer part boundaries where Dirichlet conditions for field propagator
       must be enforced).
     */
    mimmo::SelectionByPID * cgnsDirichlet = new mimmo::SelectionByPID();
    cgnsDirichlet->setPID({1, 2});
    cgnsDirichlet->setPlotInExecution(true);
 
    /*
      Select and extract from target boundary mesh the PID = 3
      (Simmetry plane where Slip/impermeability conditions for field propagator
      will be imposed).
     */
    mimmo::SelectionByPID * cgnsSlip = new mimmo::SelectionByPID();
    cgnsSlip->setPID({3});
    cgnsSlip->setPlotInExecution(true);
 
    /*
        Sub-select with a Box primitive the result of cgnDirichlet block.
        to isolate the wing surface
        It will require span and origin to define properly the box .
     */
    mimmo::SelectionByBox * boxSel = new mimmo::SelectionByBox();
    boxSel->setOrigin({{700., 800., 0.}});
    boxSel->setSpan(1500.,1600.,100.);
    boxSel->setPlotInExecution(true);
 
    /*
        Create a Rotation global manipulator. It will Rotate the isolated wing sub-selection
        of a prescribed rotation angle around a prescribed axis direction, and make the
        relative deformation field available
     */
    mimmo::RotationGeometry* rotation = new mimmo::RotationGeometry();
    rotation->setDirection(darray3E{0.1,1.,0.});
    rotation->setRotation((BITPIT_PI/18.0));
 
    /*
      It will reconstruct the rotation deformation field defined on the isolated wing patch to
      the cgnsDirichlet compound sub-patch.
     */
    mimmo::ReconstructVector* recon = new mimmo::ReconstructVector();
    recon->setPlotInExecution(true);
 
    /*
        The block will propagate the reconstructed deformation field defined on
        cgnsDirichlet subpatch into the bulk volume mesh, moving its internal points
        coherently.
        Dirichlet conditions will be applied connecting cgnsDirichlet subpatch and
        the field just reconstructed on it.
        Slip/impermeability conditions will be enforced on cgnsSlip sub-patch to
        keep the simmetry of the wall.
        The final result will be a consistent deformation field defined on the whole
        volume mesh, boundaries included.
        For set up of damping and narrowband features of the class please visit the
        doxygen documentation
     */
    mimmo::PropagateVectorField* prop = new mimmo::PropagateVectorField();
    prop->setPlotInExecution(true);
    prop->setTolerance(1.0e-9);
    prop->setUpdateThreshold(1.0e-12);
    prop->setDamping(true);
    prop->setDampingType(0);
    prop->setDampingInnerDistance(0.01);
    prop->setDampingOuterDistance(80.0);
    prop->setDampingDecayFactor(3.0);
    prop->setNarrowBand(true);
    prop->setNarrowBandWidth(80.0);
    prop->setNarrowBandRelaxation(0.3);
    prop->forcePlanarSlip(true);
    prop->setSolverMultiStep(1);
 
    /*
      Extract the deformation field of the whole boundary mesh from
      the deformation field of the whole volume mesh resulting from the prop block
      Using the id association of bulk volume and boundary meshes
     */
    mimmo::ExtractVectorField* extrF = new mimmo::ExtractVectorField();
    extrF->setMode(1);
    extrF->setPlotInExecution(true);
 
    /*
       Create an Apply block.
       It applies the deformation displacements
       to the selected input volume geometry.
     */
    mimmo::Apply* applier = new mimmo::Apply();
 
    /*
       Create an Apply block.
       It applies the deformation displacements
       to the selected input surface boundary geometry.
     */
    mimmo::Apply* applierS = new mimmo::Apply();
 
    /* Define connection between blocks. */
#if MIMMO_ENABLE_MPI
    mimmo::pin::addPin(cgnsI, partition, M_GEOM, M_GEOM)  ;
    mimmo::pin::addPin(cgnsI, partition, M_GEOM2, M_GEOM2)  ;
    mimmo::pin::addPin(partition, cgnsDirichlet, M_GEOM2, M_GEOM)  ;
    mimmo::pin::addPin(partition, cgnsSlip, M_GEOM2, M_GEOM)  ;
#else
    mimmo::pin::addPin(cgnsI, cgnsDirichlet, M_GEOM2, M_GEOM)  ;
    mimmo::pin::addPin(cgnsI, cgnsSlip, M_GEOM2, M_GEOM)  ;
#endif
 
    mimmo::pin::addPin(cgnsDirichlet, boxSel, M_GEOM, M_GEOM)  ;
 
    mimmo::pin::addPin(boxSel, rotation, M_GEOM, M_GEOM)  ;
    mimmo::pin::addPin(rotation, recon, M_GDISPLS, M_VECTORFIELD)  ;
    mimmo::pin::addPin(cgnsDirichlet, recon, M_GEOM, M_GEOM)  ;
 
#if MIMMO_ENABLE_MPI
    mimmo::pin::addPin(partition, prop, M_GEOM, M_GEOM)  ;
#else
    mimmo::pin::addPin(cgnsI, prop, M_GEOM, M_GEOM)  ;
#endif
    mimmo::pin::addPin(cgnsDirichlet, prop, M_GEOM, M_GEOM2)  ;
    mimmo::pin::addPin(cgnsSlip, prop, M_GEOM, M_GEOM4)  ;
    mimmo::pin::addPin(boxSel, prop, M_GEOM, M_GEOM3)  ;
    mimmo::pin::addPin(boxSel, prop, M_GEOM, M_GEOM7)  ;
 
    mimmo::pin::addPin(recon, prop, M_VECTORFIELD, M_GDISPLS)  ;
    mimmo::pin::addPin(prop, applier, M_GDISPLS, M_GDISPLS)  ;
 
#if MIMMO_ENABLE_MPI
    mimmo::pin::addPin(partition, applier, M_GEOM, M_GEOM)  ;
    mimmo::pin::addPin(partition, extrF, M_GEOM2, M_GEOM)  ;
    mimmo::pin::addPin(partition, applierS, M_GEOM2, M_GEOM)  ;
#else
    mimmo::pin::addPin(cgnsI, applier, M_GEOM, M_GEOM)  ;
    mimmo::pin::addPin(cgnsI, extrF, M_GEOM2, M_GEOM)  ;
    mimmo::pin::addPin(cgnsI, applierS, M_GEOM2, M_GEOM)  ;
#endif
 
    mimmo::pin::addPin(prop, extrF, M_GDISPLS, M_VECTORFIELD)  ;
    mimmo::pin::addPin(extrF, applierS, M_VECTORFIELD, M_GDISPLS)  ;
 
#if MIMMO_ENABLE_MPI
    mimmo::pin::addPin(applier, serialize, M_GEOM, M_GEOM)  ;
    mimmo::pin::addPin(applierS, serialize, M_GEOM, M_GEOM2)  ;
    mimmo::pin::addPin(serialize, cgnsO, M_GEOM, M_GEOM)  ;
    mimmo::pin::addPin(serialize, cgnsO, M_GEOM2, M_GEOM2)  ;
#else
    mimmo::pin::addPin(applier, cgnsO, M_GEOM, M_GEOM)  ;
    mimmo::pin::addPin(applierS, cgnsO, M_GEOM, M_GEOM2)  ;
#endif
 
    mimmo::pin::addPin(cgnsI, cgnsO, M_BCCGNS, M_BCCGNS)  ;
 
    /* Create chains and execute them */
    mimmo::Chain ch0, ch1;
 
    //first one
    ch0.addObject(cgnsI);
#if MIMMO_ENABLE_MPI
    ch0.addObject(partition);
#endif
    ch0.addObject(cgnsDirichlet);
    ch0.addObject(cgnsSlip);
    ch0.addObject(boxSel);
    ch0.addObject(rotation);
    ch0.addObject(recon);
    ch0.addObject(prop);
    ch0.addObject(extrF);
    ch0.addObject(applier);
    ch0.addObject(applierS);
    #if MIMMO_ENABLE_MPI
       ch0.addObject(serialize);
    #endif
 
    //second one
    ch1.addObject(cgnsO);
 
    //executing them with debug flag on to provide info on execution.
    ch0.exec(true);
    ch1.exec(true);
 
    /* Destroy objects. */
    delete cgnsI;
#if MIMMO_ENABLE_MPI
    delete partition;
    delete serialize;
#endif
    delete cgnsDirichlet;
    delete cgnsSlip;
    delete boxSel;
    delete rotation;
    delete recon;
    delete prop;
    delete extrF;
    delete applier;
    delete applierS;
    delete cgnsO;
 
    return;
}
 
// =================================================================================== //
 
int main( int argc, char *argv[] ) {
 
    BITPIT_UNUSED(argc);
    BITPIT_UNUSED(argv);
 
#if MIMMO_ENABLE_MPI
    MPI_Init(&argc, &argv);
 
    {
#endif
        try{
            example00001();
        }
        catch(std::exception & e){
            std::cout<<"iocgns_example_00001 exited with an error of type : "<<e.what()<<std::endl;
            return 1;
        }
#if MIMMO_ENABLE_MPI
    }
 
    MPI_Finalize();
#endif
 
    return 0;
}