1: ! test phase space (Maxwellian) mesh construction (serial)
  2: !
  3: !run:
  4: !       -${MPIEXEC} ....
  5: !       -@${PETSC_DIR}/lib/petsc/bin/petsc_gen_xdmf.py *.h5
  6: !
  7: !
  8: ! Contributed by Mark Adams
  9: program DMPlexTestLandauInterface
 10:   use petscts
 11:   use petscdmplex
 12: #include <petsc/finclude/petscts.h>
 13: #include <petsc/finclude/petscdmplex.h>
 14:   implicit none
 15:   external LandauIFunction
 16:   external LandauIJacobian
 17:   DM             dm
 18:   PetscInt       dim
 19:   PetscInt       ii
 20:   PetscErrorCode ierr
 21:   TS             ts
 22:   Vec            X,X_0
 23:   Mat            J
 24:   SNES           snes
 25:   KSP            ksp
 26:   PC             pc
 27:   SNESLineSearch linesearch
 28:   PetscReal      mone
 29:   PetscScalar    scalar
 30:   call PetscInitialize(PETSC_NULL_CHARACTER, ierr)
 31:   if (ierr .ne. 0) then
 32:      print*,'Unable to initialize PETSc'
 33:      stop
 34:   endif
 35:   ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 36:   !  Create mesh (DM), read in parameters, create and add f_0 (X)
 37:   ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 38:   dim = 2
 39:   call LandauCreateVelocitySpace(PETSC_COMM_WORLD, dim, '', X, J, dm, ierr);CHKERRA(ierr)
 40:   call LandauCreateMassMatrix(dm, PETSC_NULL_MAT, ierr);CHKERRA(ierr)
 41:   call DMSetUp(dm,ierr);CHKERRA(ierr)
 42:   call VecDuplicate(X,X_0,ierr);CHKERRA(ierr)
 43:   call VecCopy(X,X_0,ierr)
 44:   ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 45:   !  View
 46:   ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 47:   ii = 0
 48:   call LandauPrintNorms(X,ii,ierr);CHKERRA(ierr)
 49:   mone = 0;
 50:   call DMSetOutputSequenceNumber(dm, ii, mone, ierr);CHKERRA(ierr);
 51:   ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 52:   !    Create timestepping solver context
 53:   ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 54:   call TSCreate(PETSC_COMM_SELF,ts,ierr);CHKERRA(ierr)
 55:   call TSSetOptionsPrefix(ts, 'ex1_', ierr);CHKERRA(ierr) ! should get this from the dm or give it to the dm
 56:   call TSSetDM(ts,dm,ierr);CHKERRA(ierr)
 57:   call TSGetSNES(ts,snes,ierr);CHKERRA(ierr)
 58:   call SNESSetOptionsPrefix(snes, 'ex1_', ierr);CHKERRA(ierr) ! should get this from the dm or give it to the dm
 59:   call SNESGetLineSearch(snes,linesearch,ierr);CHKERRA(ierr)
 60:   call SNESLineSearchSetType(linesearch,SNESLINESEARCHBASIC,ierr);CHKERRA(ierr)
 61:   call TSSetIFunction(ts,PETSC_NULL_VEC,LandauIFunction,PETSC_NULL_VEC,ierr);CHKERRA(ierr)
 62:   call TSSetIJacobian(ts,J,J,LandauIJacobian,PETSC_NULL_VEC,ierr);CHKERRA(ierr)
 63:   call TSSetExactFinalTime(ts,TS_EXACTFINALTIME_STEPOVER,ierr);CHKERRA(ierr)

 65:   call SNESGetKSP(snes,ksp,ierr);CHKERRA(ierr)
 66:   call KSPSetOptionsPrefix(ksp, 'ex1_', ierr);CHKERRA(ierr) ! should get this from the dm or give it to the dm
 67:   call KSPGetPC(ksp,pc,ierr);CHKERRA(ierr)
 68:   call PCSetOptionsPrefix(pc, 'ex1_', ierr);CHKERRA(ierr) ! should get this from the dm or give it to the dm

 70:   call TSSetFromOptions(ts,ierr);CHKERRA(ierr)
 71:   call TSSetSolution(ts,X,ierr);CHKERRA(ierr)
 72:   ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 73:   !  Solve nonlinear system
 74:   ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 75:   call TSSolve(ts,X,ierr);CHKERRA(ierr)
 76:   ii = 1
 77:   call LandauPrintNorms(X,ii,ierr);CHKERRA(ierr)
 78:   call TSGetTime(ts, mone, ierr);CHKERRA(ierr);
 79:   call DMSetOutputSequenceNumber(dm, ii, mone, ierr);CHKERRA(ierr);
 80:   ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 81:   !  remove f_0
 82:   ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 83:   scalar = -1.
 84:   call VecAXPY(X,scalar,X_0,ierr);CHKERRA(ierr)
 85:   call LandauDestroyVelocitySpace(dm, ierr);CHKERRA(ierr)
 86:   call TSDestroy(ts, ierr);CHKERRA(ierr)
 87:   call VecDestroy(X, ierr);CHKERRA(ierr)
 88:   call VecDestroy(X_0, ierr);CHKERRA(ierr)
 89:   call PetscFinalize(ierr)
 90: end program DMPlexTestLandauInterface

 92: !/*TEST
 93: !  build:
 94: !    requires: defined(PETSC_USING_F90FREEFORM)
 95: !
 96: !  test:
 97: !    suffix: 0
 98: !    requires: p4est !complex
 99: !    args: -dm_landau_num_species_grid 1,2 -petscspace_degree 3 -petscspace_poly_tensor 1 -dm_landau_type p4est -dm_landau_ion_masses 2,4 -dm_landau_ion_charges 1,18 -dm_landau_thermal_temps 5,5,.5 -dm_landau_n 1.00018,1,1e-5 -dm_landau_n_0 1e20 -ex1_ts_monitor -ex1_snes_rtol 1.e-14 -ex1_snes_stol 1.e-14 -ex1_snes_monitor -ex1_snes_converged_reason -ex1_ts_type arkimex -ex1_ts_arkimex_type 1bee -ex1_ts_max_snes_failures -1 -ex1_ts_rtol 1e-1 -ex1_ts_dt 1.e-1 -ex1_ts_max_time 1 -ex1_ts_adapt_clip .5,1.25 -ex1_ts_adapt_scale_solve_failed 0.75 -ex1_ts_adapt_time_step_increase_delay 5 -ex1_ts_max_steps 1 -ex1_pc_type lu -ex1_ksp_type preonly -dm_landau_amr_levels_max 2,1
100: !
101: !TEST*/