コード例 #1
0
ファイル: ex2.c プロジェクト: firedrakeproject/petsc
PetscErrorCode SetupDiscretization(DM dm, AppCtx *user)
{
  DM              cdm = dm;
  const PetscInt  dim = 2;
  PetscFE         fe[3];
  PetscQuadrature q;
  PetscInt        f;
  MPI_Comm        comm;
  PetscErrorCode  ierr;

  PetscFunctionBeginUser;
  /* Create finite element */
  ierr = PetscObjectGetComm((PetscObject) dm, &comm);CHKERRQ(ierr);
  ierr = PetscFECreateDefault(comm, dim, 1, PETSC_TRUE, "potential_", -1, &fe[0]);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject) fe[0], "potential");CHKERRQ(ierr);
  ierr = PetscFEGetQuadrature(fe[0], &q);CHKERRQ(ierr);
  ierr = PetscFECreateDefault(comm, dim, 1, PETSC_TRUE, "charge_", -1, &fe[1]);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject) fe[1], "charge");CHKERRQ(ierr);
  ierr = PetscFESetQuadrature(fe[1], q);CHKERRQ(ierr);
  ierr = PetscFECreateDefault(comm, dim, 1, PETSC_TRUE, "multiplier_", -1, &fe[2]);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject) fe[2], "multiplier");CHKERRQ(ierr);
  ierr = PetscFESetQuadrature(fe[2], q);CHKERRQ(ierr);
  /* Set discretization and boundary conditions for each mesh */
  for (f = 0; f < 3; ++f) {ierr = DMSetField(dm, f, NULL, (PetscObject) fe[f]);CHKERRQ(ierr);}
  ierr = DMCreateDS(cdm);CHKERRQ(ierr);
  ierr = SetupProblem(dm, user);CHKERRQ(ierr);
  while (cdm) {
    ierr = DMCopyDisc(dm, cdm);CHKERRQ(ierr);
    ierr = DMGetCoarseDM(cdm, &cdm);CHKERRQ(ierr);
  }
  for (f = 0; f < 3; ++f) {ierr = PetscFEDestroy(&fe[f]);CHKERRQ(ierr);}
  PetscFunctionReturn(0);
}
コード例 #2
0
ファイル: planiv.cpp プロジェクト: freemancw/plan.js
int main(int argc, char *argv[])
{
  string path;
  GuiPlanner *gui;
  Model *m = NULL;
  Geom *g = NULL;
  Problem *prob;

  if (argc < 2) {
    cout << "Usage:    " << argv[0] << " <problem path>\n";
    exit(-1);
  }

  path = string(argv[1])+"/";

  if (!is_directory(path)) {
    cout << "Error:   Directory does not exist\n";
    exit(-1);
  }

  SetupProblem(m,g,path);
  
  prob = new Problem(g,m,path);

  gui = new GuiPlanner(new RenderIv(new Scene(prob, path), path),
		       new RRTConCon(prob));

  gui->Start();

  return 0;
}
コード例 #3
0
ファイル: ex71.c プロジェクト: petsc/petsc
PetscErrorCode SetupDiscretization(DM dm, AppCtx *user)
{
  DM              cdm   = dm;
  const PetscInt  dim   = user->dim;
  PetscFE         fe[2];
  PetscQuadrature q;
  Parameter      *param;
  MPI_Comm        comm;
  PetscErrorCode  ierr;

  PetscFunctionBeginUser;
  /* Create finite element */
  ierr = PetscObjectGetComm((PetscObject) dm, &comm);CHKERRQ(ierr);
  ierr = PetscFECreateDefault(comm, dim, dim, user->simplex, "vel_", PETSC_DEFAULT, &fe[0]);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject) fe[0], "velocity");CHKERRQ(ierr);
  ierr = PetscFEGetQuadrature(fe[0], &q);CHKERRQ(ierr);
  ierr = PetscFECreateDefault(comm, dim, 1, user->simplex, "pres_", PETSC_DEFAULT, &fe[1]);CHKERRQ(ierr);
  ierr = PetscFESetQuadrature(fe[1], q);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject) fe[1], "pressure");CHKERRQ(ierr);
  /* Set discretization and boundary conditions for each mesh */
  ierr = DMSetField(dm, 0, NULL, (PetscObject) fe[0]);CHKERRQ(ierr);
  ierr = DMSetField(dm, 1, NULL, (PetscObject) fe[1]);CHKERRQ(ierr);
  ierr = DMCreateDS(dm);CHKERRQ(ierr);
  ierr = SetupProblem(dm, user);CHKERRQ(ierr);
  ierr = PetscBagGetData(user->bag, (void **) &param);CHKERRQ(ierr);
  while (cdm) {
    ierr = DMCopyDisc(dm, cdm);CHKERRQ(ierr);
    ierr = DMPlexCreateBasisRotation(cdm, param->alpha, 0.0, 0.0);CHKERRQ(ierr);
    ierr = DMGetCoarseDM(cdm, &cdm);CHKERRQ(ierr);
  }
  ierr = PetscFEDestroy(&fe[0]);CHKERRQ(ierr);
  ierr = PetscFEDestroy(&fe[1]);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}
コード例 #4
0
ファイル: ex45.c プロジェクト: petsc/petsc
static PetscErrorCode SetupDiscretization(DM dm, AppCtx* ctx)
{
    DM             cdm = dm;
    const PetscInt dim = ctx->dim;
    const PetscInt id  = 1;
    PetscDS        prob;
    PetscFE        fe;
    PetscErrorCode ierr;

    PetscFunctionBeginUser;
    /* Create finite element */
    ierr = PetscFECreateDefault(dm, dim, 1, ctx->simplex, "temp_", -1, &fe);
    CHKERRQ(ierr);
    ierr = PetscObjectSetName((PetscObject) fe, "temperature");
    CHKERRQ(ierr);
    /* Set discretization and boundary conditions for each mesh */
    ierr = DMGetDS(dm, &prob);
    CHKERRQ(ierr);
    ierr = PetscDSSetDiscretization(prob, 0, (PetscObject) fe);
    CHKERRQ(ierr);
    ierr = SetupProblem(prob, ctx);
    CHKERRQ(ierr);
    while (cdm) {
        PetscBool hasLabel;

        ierr = DMSetDS(cdm, prob);
        CHKERRQ(ierr);
        ierr = DMHasLabel(cdm, "marker", &hasLabel);
        CHKERRQ(ierr);
        if (!hasLabel) {
            ierr = CreateBCLabel(cdm, "marker");
            CHKERRQ(ierr);
        }
        ierr = DMGetCoarseDM(cdm, &cdm);
        CHKERRQ(ierr);
    }
    ierr = PetscFEDestroy(&fe);
    CHKERRQ(ierr);
    PetscFunctionReturn(0);
}
コード例 #5
0
ファイル: ex1.c プロジェクト: masa-ito/PETScToPoisson
PetscErrorCode SetupDiscretization(DM dm, AppCtx *user)
{
  DM              cdm = dm;
  const PetscInt  dim = 2;
  PetscFE         fe[3];
  PetscQuadrature q;
  PetscInt        f;
  PetscErrorCode  ierr;

  PetscFunctionBeginUser;
  /* Create finite element */
  ierr = PetscFECreateDefault(dm, dim, 1, PETSC_TRUE, "potential_", -1, &fe[0]);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject) fe[0], "potential");CHKERRQ(ierr);
  ierr = PetscFEGetQuadrature(fe[0], &q);CHKERRQ(ierr);
  ierr = PetscFECreateDefault(dm, dim, 1, PETSC_TRUE, "conductivity_", -1, &fe[1]);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject) fe[1], "conductivity");CHKERRQ(ierr);
  ierr = PetscFESetQuadrature(fe[1], q);CHKERRQ(ierr);
  ierr = PetscFECreateDefault(dm, dim, 1, PETSC_TRUE, "multiplier_", -1, &fe[2]);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject) fe[2], "multiplier");CHKERRQ(ierr);
  ierr = PetscFESetQuadrature(fe[2], q);CHKERRQ(ierr);
  /* Set discretization and boundary conditions for each mesh */
  while (cdm) {
    const PetscInt id = 1;
    PetscDS        prob;

    ierr = DMGetDS(cdm, &prob);CHKERRQ(ierr);
    for (f = 0; f < 3; ++f) {ierr = PetscDSSetDiscretization(prob, f, (PetscObject) fe[f]);CHKERRQ(ierr);}
    ierr = SetupProblem(cdm, user);CHKERRQ(ierr);
    ierr = DMAddBoundary(cdm, PETSC_TRUE, "wall", "marker", 0, 0, NULL, (void (*)()) user->exactFuncs[0], 1, &id, user);CHKERRQ(ierr);
    ierr = DMAddBoundary(cdm, PETSC_TRUE, "wall", "marker", 1, 0, NULL, (void (*)()) user->exactFuncs[1], 1, &id, user);CHKERRQ(ierr);
    ierr = DMAddBoundary(cdm, PETSC_TRUE, "wall", "marker", 2, 0, NULL, (void (*)()) user->exactFuncs[2], 1, &id, user);CHKERRQ(ierr);
    ierr = DMGetCoarseDM(cdm, &cdm);CHKERRQ(ierr);
  }
  for (f = 0; f < 3; ++f) {ierr = PetscFEDestroy(&fe[f]);CHKERRQ(ierr);}
  PetscFunctionReturn(0);
}
コード例 #6
0
ファイル: ex12.c プロジェクト: placasse/petsc
int main(int argc, char **argv)
{
  DM             dm;          /* Problem specification */
  DM             dmAux;       /* Material specification */
  SNES           snes;        /* nonlinear solver */
  Vec            u,r;         /* solution, residual vectors */
  Mat            A,J;         /* Jacobian matrix */
  MatNullSpace   nullSpace;   /* May be necessary for Neumann conditions */
  AppCtx         user;        /* user-defined work context */
  JacActionCtx   userJ;       /* context for Jacobian MF action */
  PetscInt       its;         /* iterations for convergence */
  PetscReal      error = 0.0; /* L_2 error in the solution */
  PetscInt       numComponents;
  PetscErrorCode ierr;

  ierr = PetscInitialize(&argc, &argv, NULL, help);CHKERRQ(ierr);
  ierr = ProcessOptions(PETSC_COMM_WORLD, &user);CHKERRQ(ierr);
  ierr = SNESCreate(PETSC_COMM_WORLD, &snes);CHKERRQ(ierr);
  ierr = CreateMesh(PETSC_COMM_WORLD, &user, &dm);CHKERRQ(ierr);
  ierr = SNESSetDM(snes, dm);CHKERRQ(ierr);
  ierr = DMSetApplicationContext(dm, &user);CHKERRQ(ierr);

  user.fem.fe = user.fe;
  ierr = PetscFECreateDefault(dm, user.dim, 1, PETSC_TRUE, NULL, -1, &user.fe[0]);CHKERRQ(ierr);
  if (user.bcType != NEUMANN) {
    user.fem.feBd = NULL; user.feBd[0] = NULL;
  } else {
    user.fem.feBd = user.feBd;
    ierr = PetscFECreateDefault(dm, user.dim-1, 1, PETSC_TRUE, "bd_", -1, &user.feBd[0]);CHKERRQ(ierr);
  }
  ierr = PetscFEGetNumComponents(user.fe[0], &numComponents);CHKERRQ(ierr);
  ierr = PetscMalloc(NUM_FIELDS * sizeof(void (*)(const PetscReal[], PetscScalar *, void *)), &user.exactFuncs);CHKERRQ(ierr);
  ierr = SetupProblem(dm, &user);CHKERRQ(ierr);
  ierr = SetupSection(dm, &user);CHKERRQ(ierr);
  /* Setup Material */
  ierr = DMClone(dm, &dmAux);CHKERRQ(ierr);
  ierr = DMPlexCopyCoordinates(dm, dmAux);CHKERRQ(ierr);
  if (user.variableCoefficient != COEFF_FIELD) {
    user.fem.feAux = NULL; user.feAux[0] = NULL;
  } else {
    PetscQuadrature q;

    user.fem.feAux = user.feAux;
    ierr = PetscFECreateDefault(dmAux, user.dim, 1, PETSC_TRUE, "mat_", -1, &user.feAux[0]);CHKERRQ(ierr);
    ierr = PetscFEGetQuadrature(user.fe[0], &q);CHKERRQ(ierr);
    ierr = PetscFESetQuadrature(user.feAux[0], q);CHKERRQ(ierr);
  }
  ierr = SetupMaterialSection(dmAux, &user);CHKERRQ(ierr);
  ierr = SetupMaterial(dm, dmAux, &user);CHKERRQ(ierr);
  ierr = DMDestroy(&dmAux);CHKERRQ(ierr);

  ierr = DMCreateGlobalVector(dm, &u);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject) u, "potential");CHKERRQ(ierr);
  ierr = VecDuplicate(u, &r);CHKERRQ(ierr);

  ierr = DMSetMatType(dm,MATAIJ);CHKERRQ(ierr);
  ierr = DMCreateMatrix(dm, &J);CHKERRQ(ierr);
  if (user.jacobianMF) {
    PetscInt M, m, N, n;

    ierr = MatGetSize(J, &M, &N);CHKERRQ(ierr);
    ierr = MatGetLocalSize(J, &m, &n);CHKERRQ(ierr);
    ierr = MatCreate(PETSC_COMM_WORLD, &A);CHKERRQ(ierr);
    ierr = MatSetSizes(A, m, n, M, N);CHKERRQ(ierr);
    ierr = MatSetType(A, MATSHELL);CHKERRQ(ierr);
    ierr = MatSetUp(A);CHKERRQ(ierr);
#if 0
    ierr = MatShellSetOperation(A, MATOP_MULT, (void (*)(void))FormJacobianAction);CHKERRQ(ierr);
#endif

    userJ.dm   = dm;
    userJ.J    = J;
    userJ.user = &user;

    ierr = DMCreateLocalVector(dm, &userJ.u);CHKERRQ(ierr);
    ierr = DMPlexProjectFunctionLocal(dm, user.fe, user.exactFuncs, NULL, INSERT_BC_VALUES, userJ.u);CHKERRQ(ierr);
    ierr = MatShellSetContext(A, &userJ);CHKERRQ(ierr);
  } else {
    A = J;
  }
  if (user.bcType == NEUMANN) {
    ierr = MatNullSpaceCreate(PetscObjectComm((PetscObject) dm), PETSC_TRUE, 0, NULL, &nullSpace);CHKERRQ(ierr);
    ierr = MatSetNullSpace(J, nullSpace);CHKERRQ(ierr);
    if (A != J) {
      ierr = MatSetNullSpace(A, nullSpace);CHKERRQ(ierr);
    }
  }

  ierr = DMSNESSetFunctionLocal(dm,  (PetscErrorCode (*)(DM,Vec,Vec,void*)) DMPlexComputeResidualFEM, &user);CHKERRQ(ierr);
  ierr = DMSNESSetJacobianLocal(dm,  (PetscErrorCode (*)(DM,Vec,Mat,Mat,void*)) DMPlexComputeJacobianFEM, &user);CHKERRQ(ierr);
  ierr = SNESSetJacobian(snes, A, J, NULL, NULL);CHKERRQ(ierr);

  ierr = SNESSetFromOptions(snes);CHKERRQ(ierr);

  ierr = DMPlexProjectFunction(dm, user.fe, user.exactFuncs, NULL, INSERT_ALL_VALUES, u);CHKERRQ(ierr);
  if (user.checkpoint) {
#if defined(PETSC_HAVE_HDF5)
    ierr = PetscViewerHDF5PushGroup(user.checkpoint, "/fields");CHKERRQ(ierr);
    ierr = VecLoad(u, user.checkpoint);CHKERRQ(ierr);
    ierr = PetscViewerHDF5PopGroup(user.checkpoint);CHKERRQ(ierr);
#endif
  }
  ierr = PetscViewerDestroy(&user.checkpoint);CHKERRQ(ierr);
  if (user.showInitial) {
    Vec lv;
    ierr = DMGetLocalVector(dm, &lv);CHKERRQ(ierr);
    ierr = DMGlobalToLocalBegin(dm, u, INSERT_VALUES, lv);CHKERRQ(ierr);
    ierr = DMGlobalToLocalEnd(dm, u, INSERT_VALUES, lv);CHKERRQ(ierr);
    ierr = DMPrintLocalVec(dm, "Local function", 1.0e-10, lv);CHKERRQ(ierr);
    ierr = DMRestoreLocalVector(dm, &lv);CHKERRQ(ierr);
  }
  if (user.runType == RUN_FULL) {
    void (*initialGuess[numComponents])(const PetscReal x[], PetscScalar *, void *ctx);
    PetscInt c;

    for (c = 0; c < numComponents; ++c) initialGuess[c] = zero;
    ierr = DMPlexProjectFunction(dm, user.fe, initialGuess, NULL, INSERT_VALUES, u);CHKERRQ(ierr);
    if (user.debug) {
      ierr = PetscPrintf(PETSC_COMM_WORLD, "Initial guess\n");CHKERRQ(ierr);
      ierr = VecView(u, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
    }
    ierr = SNESSolve(snes, NULL, u);CHKERRQ(ierr);
    ierr = SNESGetIterationNumber(snes, &its);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD, "Number of SNES iterations = %D\n", its);CHKERRQ(ierr);
    ierr = DMPlexComputeL2Diff(dm, user.fe, user.exactFuncs, NULL, u, &error);CHKERRQ(ierr);
    if (error < 1.0e-11) {ierr = PetscPrintf(PETSC_COMM_WORLD, "L_2 Error: < 1.0e-11\n");CHKERRQ(ierr);}
    else                 {ierr = PetscPrintf(PETSC_COMM_WORLD, "L_2 Error: %g\n", error);CHKERRQ(ierr);}
    if (user.showSolution) {
      ierr = PetscPrintf(PETSC_COMM_WORLD, "Solution\n");CHKERRQ(ierr);
      ierr = VecChop(u, 3.0e-9);CHKERRQ(ierr);
      ierr = VecView(u, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
    }
  } else if (user.runType == RUN_PERF) {
    PetscReal res = 0.0;

    ierr = SNESComputeFunction(snes, u, r);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD, "Initial Residual\n");CHKERRQ(ierr);
    ierr = VecChop(r, 1.0e-10);CHKERRQ(ierr);
    ierr = VecNorm(r, NORM_2, &res);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD, "L_2 Residual: %g\n", res);CHKERRQ(ierr);
  } else {
    PetscReal res = 0.0;

    /* Check discretization error */
    ierr = PetscPrintf(PETSC_COMM_WORLD, "Initial guess\n");CHKERRQ(ierr);
    ierr = VecView(u, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
    ierr = DMPlexComputeL2Diff(dm, user.fe, user.exactFuncs, NULL, u, &error);CHKERRQ(ierr);
    if (error < 1.0e-11) {ierr = PetscPrintf(PETSC_COMM_WORLD, "L_2 Error: < 1.0e-11\n");CHKERRQ(ierr);}
    else                 {ierr = PetscPrintf(PETSC_COMM_WORLD, "L_2 Error: %g\n", error);CHKERRQ(ierr);}
    /* Check residual */
    ierr = SNESComputeFunction(snes, u, r);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD, "Initial Residual\n");CHKERRQ(ierr);
    ierr = VecChop(r, 1.0e-10);CHKERRQ(ierr);
    ierr = VecView(r, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
    ierr = VecNorm(r, NORM_2, &res);CHKERRQ(ierr);
    ierr = PetscPrintf(PETSC_COMM_WORLD, "L_2 Residual: %g\n", res);CHKERRQ(ierr);
    /* Check Jacobian */
    {
      Vec          b;

      ierr = SNESComputeJacobian(snes, u, A, A);CHKERRQ(ierr);
      ierr = VecDuplicate(u, &b);CHKERRQ(ierr);
      ierr = VecSet(r, 0.0);CHKERRQ(ierr);
      ierr = SNESComputeFunction(snes, r, b);CHKERRQ(ierr);
      ierr = MatMult(A, u, r);CHKERRQ(ierr);
      ierr = VecAXPY(r, 1.0, b);CHKERRQ(ierr);
      ierr = VecDestroy(&b);CHKERRQ(ierr);
      ierr = PetscPrintf(PETSC_COMM_WORLD, "Au - b = Au + F(0)\n");CHKERRQ(ierr);
      ierr = VecChop(r, 1.0e-10);CHKERRQ(ierr);
      ierr = VecView(r, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);
      ierr = VecNorm(r, NORM_2, &res);CHKERRQ(ierr);
      ierr = PetscPrintf(PETSC_COMM_WORLD, "Linear L_2 Residual: %g\n", res);CHKERRQ(ierr);
    }
  }
  ierr = VecViewFromOptions(u, NULL, "-vec_view");CHKERRQ(ierr);

  if (user.bcType == NEUMANN) {
    ierr = MatNullSpaceDestroy(&nullSpace);CHKERRQ(ierr);
  }
  if (user.jacobianMF) {
    ierr = VecDestroy(&userJ.u);CHKERRQ(ierr);
  }
  if (A != J) {ierr = MatDestroy(&A);CHKERRQ(ierr);}
  ierr = PetscFEDestroy(&user.fe[0]);CHKERRQ(ierr);
  ierr = PetscFEDestroy(&user.feBd[0]);CHKERRQ(ierr);
  ierr = PetscFEDestroy(&user.feAux[0]);CHKERRQ(ierr);
  ierr = MatDestroy(&J);CHKERRQ(ierr);
  ierr = VecDestroy(&u);CHKERRQ(ierr);
  ierr = VecDestroy(&r);CHKERRQ(ierr);
  ierr = SNESDestroy(&snes);CHKERRQ(ierr);
  ierr = DMDestroy(&dm);CHKERRQ(ierr);
  ierr = PetscFree(user.exactFuncs);CHKERRQ(ierr);
  ierr = PetscFinalize();
  return 0;
}
コード例 #7
0
ファイル: ex12.c プロジェクト: OpenCMISS-Dependencies/petsc
PetscErrorCode SetupDiscretization(DM dm, AppCtx *user)
{
  DM             cdm   = dm;
  const PetscInt dim   = user->dim;
  const PetscInt id    = 1;
  PetscFE        feAux = NULL;
  PetscFE        feBd  = NULL;
  PetscFE        feCh  = NULL;
  PetscFE        fe;
  PetscDS        prob;
  PetscErrorCode ierr;

  PetscFunctionBeginUser;
  /* Create finite element */
  ierr = PetscFECreateDefault(dm, dim, 1, PETSC_TRUE, NULL, -1, &fe);CHKERRQ(ierr);
  ierr = PetscObjectSetName((PetscObject) fe, "potential");CHKERRQ(ierr);
  if (user->bcType == NEUMANN) {
    ierr = PetscFECreateDefault(dm, dim-1, 1, PETSC_TRUE, "bd_", -1, &feBd);CHKERRQ(ierr);
    ierr = PetscObjectSetName((PetscObject) feBd, "potential");CHKERRQ(ierr);
  }
  if (user->variableCoefficient == COEFF_FIELD) {
    PetscQuadrature q;

    ierr = PetscFECreateDefault(dm, dim, 1, PETSC_TRUE, "mat_", -1, &feAux);CHKERRQ(ierr);
    ierr = PetscFEGetQuadrature(fe, &q);CHKERRQ(ierr);
    ierr = PetscFESetQuadrature(feAux, q);CHKERRQ(ierr);
  }
  if (user->check) {ierr = PetscFECreateDefault(dm, dim, 1, PETSC_TRUE, "ch_", -1, &feCh);CHKERRQ(ierr);}
  /* Set discretization and boundary conditions for each mesh */
  while (cdm) {
    ierr = DMGetDS(cdm, &prob);CHKERRQ(ierr);
    ierr = PetscDSSetDiscretization(prob, 0, (PetscObject) fe);CHKERRQ(ierr);
    ierr = PetscDSSetBdDiscretization(prob, 0, (PetscObject) feBd);CHKERRQ(ierr);
    if (feAux) {
      DM      dmAux;
      PetscDS probAux;

      ierr = DMClone(cdm, &dmAux);CHKERRQ(ierr);
      ierr = DMPlexCopyCoordinates(cdm, dmAux);CHKERRQ(ierr);
      ierr = DMGetDS(dmAux, &probAux);CHKERRQ(ierr);
      ierr = PetscDSSetDiscretization(probAux, 0, (PetscObject) feAux);CHKERRQ(ierr);
      ierr = PetscObjectCompose((PetscObject) dm, "dmAux", (PetscObject) dmAux);CHKERRQ(ierr);
      ierr = SetupMaterial(cdm, dmAux, user);CHKERRQ(ierr);
      ierr = DMDestroy(&dmAux);CHKERRQ(ierr);
    }
    if (feCh) {
      DM      dmCh;
      PetscDS probCh;

      ierr = DMClone(cdm, &dmCh);CHKERRQ(ierr);
      ierr = DMPlexCopyCoordinates(cdm, dmCh);CHKERRQ(ierr);
      ierr = DMGetDS(dmCh, &probCh);CHKERRQ(ierr);
      ierr = PetscDSSetDiscretization(probCh, 0, (PetscObject) feCh);CHKERRQ(ierr);
      ierr = PetscObjectCompose((PetscObject) dm, "dmCh", (PetscObject) dmCh);CHKERRQ(ierr);
      ierr = DMDestroy(&dmCh);CHKERRQ(ierr);
    }
    ierr = SetupProblem(cdm, user);CHKERRQ(ierr);
    ierr = DMPlexAddBoundary(cdm, user->bcType == DIRICHLET, "wall", user->bcType == NEUMANN ? "boundary" : "marker", 0, user->exactFuncs[0], 1, &id, user);CHKERRQ(ierr);
    ierr = DMPlexGetCoarseDM(cdm, &cdm);CHKERRQ(ierr);
  }
  ierr = PetscFEDestroy(&fe);CHKERRQ(ierr);
  ierr = PetscFEDestroy(&feBd);CHKERRQ(ierr);
  ierr = PetscFEDestroy(&feAux);CHKERRQ(ierr);
  ierr = PetscFEDestroy(&feCh);CHKERRQ(ierr);
  PetscFunctionReturn(0);
}