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parallel_2d.cc
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Tue, Nov 19, 03:38

parallel_2d.cc
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/**
* @file parallel_2d.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri Oct 22 2010
* @date last modification: Tue Jun 24 2014
*
* @brief Parallel example
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu 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 Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
#include <limits>
#include <fstream>
/* -------------------------------------------------------------------------- */
#include "mesh_io.hh"
#include "solid_mechanics_model.hh"
/* -------------------------------------------------------------------------- */
using namespace akantu;
int main(int argc, char *argv[])
{
initialize("material.dat", argc, argv);
debug::setDebugLevel(dblError);
UInt spatial_dimension = 2;
UInt max_steps = 10000;
Real time_factor = 0.8;
Real max_disp = 1e-6;
Mesh mesh(spatial_dimension);
StaticCommunicator & comm = StaticCommunicator::getStaticCommunicator();
Int psize = comm.getNbProc();
Int prank = comm.whoAmI();
akantu::MeshPartition * partition = NULL;
if(prank == 0) {
// Read the mesh
mesh.read("square_2d.msh");
partition = new MeshPartitionScotch(mesh, spatial_dimension);
partition->partitionate(psize);
}
SolidMechanicsModel model(mesh);
/// model initialization
model.initParallel(partition);
delete partition;
model.initFull();
if(prank == 0) std::cout << model.getMaterial(0) << std::endl;
model.setBaseName("multi");
model.addDumpFieldVector("displacement");
model.addDumpFieldVector("velocity");
model.addDumpFieldVector("acceleration");
model.addDumpFieldTensor("stress");
model.addDumpFieldTensor("grad_u");
/// boundary conditions
Real eps = 1e-16;
const Array<Real> & pos = mesh.getNodes();
Array<Real> & disp = model.getDisplacement();
Array<bool> & boun = model.getBlockedDOFs();
mesh.computeBoundingBox();
Real left_side = mesh.getLowerBounds()(0);
Real right_side = mesh.getUpperBounds()(0);
for (UInt i = 0; i < mesh.getNbNodes(); ++i) {
if(std::abs(pos(i,0) - left_side) < eps) {
disp(i, 0) = max_disp;
boun(i, 0) = true;
}
if(std::abs(pos(i,0) - right_side) < eps) {
disp(i, 0) = -max_disp;
boun(i, 0) = true;
}
}
Real time_step = model.getStableTimeStep() * time_factor;
std::cout << "Time Step = " << time_step << "s" << std::endl;
model.setTimeStep(time_step);
model.dump();
for(UInt s = 1; s <= max_steps; ++s) {
model.explicitPred();
model.updateResidual();
model.updateAcceleration();
model.explicitCorr();
if(s % 200 == 0) model.dump();
if(prank == 0 && s % 100 == 0)
std::cout << "passing step " << s << "/" << max_steps << std::endl;
}
finalize();
return EXIT_SUCCESS;
}

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