- Set
PETSC_DIRandPETSC_ARCHappropriately for your petsc installation (such that$PETSC_DIR/$PETSC_ARCHis the path to the installation directory). make
The settings.yaml has most of the default options necessary.
Run using (for example):
mpirun -n 4 ./exec -options_file setting.yaml
Size of the problem is controlled by -dm_plex_box_faces flag. So a 100x100x100 mesh would be:
mpirun -n 4 ./exec -options_file setting.yaml -dm_plex_box_faces 100,100,100
Order of the elements is set via -degree. So quadratic elements would have -degree 2
The time taken to write the file is printed out at the end (via the VecView event in PETSc).
To have a non-zero solution written to the file, use flag -project_solution.