xref: /petsc/src/ts/utils/dmplexlandau/tutorials/ex1.c (revision b122ec5aa1bd4469eb4e0673542fb7de3f411254)
1 static char help[] = "Landau collision operator driver\n\n";
2 
3 #include <petscts.h>
4 #include <petsclandau.h>
5 
6 int main(int argc, char **argv)
7 {
8   DM             dm;
9   Vec            X,X_0;
10   PetscInt       dim=2;
11   TS             ts;
12   Mat            J;
13   SNES           snes;
14   KSP            ksp;
15   PC             pc;
16   SNESLineSearch linesearch;
17   PetscReal      time;
18 
19   CHKERRQ(PetscInitialize(&argc, &argv, NULL,help));
20   CHKERRQ(PetscOptionsGetInt(NULL,NULL, "-dim", &dim, NULL));
21   /* Create a mesh */
22   CHKERRQ(DMPlexLandauCreateVelocitySpace(PETSC_COMM_SELF, dim, "", &X, &J, &dm));
23   CHKERRQ(DMSetUp(dm));
24   CHKERRQ(VecDuplicate(X,&X_0));
25   CHKERRQ(VecCopy(X,X_0));
26   CHKERRQ(DMPlexLandauPrintNorms(X,0));
27   CHKERRQ(DMSetOutputSequenceNumber(dm, 0, 0.0));
28   CHKERRQ(DMViewFromOptions(dm,NULL,"-dm_view"));
29   CHKERRQ(VecViewFromOptions(X,NULL,"-vec_view"));
30   /* Create timestepping solver context */
31   CHKERRQ(TSCreate(PETSC_COMM_SELF,&ts));
32   CHKERRQ(TSSetDM(ts,dm));
33   CHKERRQ(TSGetSNES(ts,&snes));
34   CHKERRQ(SNESGetLineSearch(snes,&linesearch));
35   CHKERRQ(SNESLineSearchSetType(linesearch,SNESLINESEARCHBASIC));
36   CHKERRQ(TSSetIFunction(ts,NULL,DMPlexLandauIFunction,NULL));
37   CHKERRQ(TSSetIJacobian(ts,J,J,DMPlexLandauIJacobian,NULL));
38   CHKERRQ(TSSetExactFinalTime(ts,TS_EXACTFINALTIME_STEPOVER));
39   CHKERRQ(SNESGetKSP(snes,&ksp));
40   CHKERRQ(KSPGetPC(ksp,&pc));
41   CHKERRQ(TSSetFromOptions(ts));
42   CHKERRQ(TSSetSolution(ts,X));
43   CHKERRQ(TSSolve(ts,X));
44   CHKERRQ(DMPlexLandauPrintNorms(X,1));
45   CHKERRQ(TSGetTime(ts, &time));
46   CHKERRQ(DMSetOutputSequenceNumber(dm, 1, time));
47   CHKERRQ(VecViewFromOptions(X,NULL,"-vec_view"));
48   CHKERRQ(VecAXPY(X,-1,X_0));
49   /* clean up */
50   CHKERRQ(DMPlexLandauDestroyVelocitySpace(&dm));
51   CHKERRQ(TSDestroy(&ts));
52   CHKERRQ(VecDestroy(&X));
53   CHKERRQ(VecDestroy(&X_0));
54   CHKERRQ(PetscFinalize());
55   return 0;
56 }
57 
58 /*TEST
59   testset:
60     requires: p4est !complex double
61     output_file: output/ex1_0.out
62     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 -ts_monitor -snes_rtol 1.e-14 -snes_stol 1.e-14 -snes_monitor -snes_converged_reason -ts_type arkimex -ts_arkimex_type 1bee -ts_max_snes_failures -1 -ts_rtol 1e-1 -ts_dt 1.e-1 -ts_max_time 1 -ts_adapt_clip .5,1.25 -ts_adapt_scale_solve_failed 0.75 -ts_adapt_time_step_increase_delay 5 -ts_max_steps 1 -pc_type lu -ksp_type preonly -dm_landau_amr_levels_max 2,1
63     test:
64       suffix: cpu
65       args: -dm_landau_device_type cpu
66     test:
67       suffix: kokkos
68       requires: kokkos_kernels
69       args: -dm_landau_device_type kokkos -dm_mat_type aijkokkos -dm_vec_type kokkos
70     test:
71       suffix: cuda
72       requires: cuda
73       args: -dm_landau_device_type cuda -dm_mat_type aijcusparse -dm_vec_type cuda -mat_cusparse_use_cpu_solve
74 
75 TEST*/
76