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Searched refs:stiff (Results 1 – 7 of 7) sorted by relevance

/petsc/src/ksp/pc/tests/ !
H A Dex10.c8 Mat stiff; member
31 PetscCall(Create1dLaplacian(n_nodes, &data_comp->stiff)); in main()
32 PetscCall(PetscObjectSetName((PetscObject)data_comp->stiff, "Stiffness")); in main()
41 PetscCall(PCSetOperators(pcHypre, data_comp->stiff, data_comp->stiff)); in main()
44 PetscCall(MatCreateVecs(data_comp->stiff, &x, &b)); in main()
94 PetscCall(MatViewFromOptions(data_comp->stiff, NULL, "-mat_view_stiff")); in DataCompExportMats()
103 PetscCall(MatDestroy(&data_comp->stiff)); in DataCompDestroy()
/petsc/src/tao/unconstrained/tutorials/ !
H A Dspectraladjointassimilation.c75 Mat stiff; /* stiffness matrix */ member
202 PetscCall(DMCreateMatrix(appctx.da, &appctx.SEMop.stiff)); in main()
210 PetscCall(RHSLaplacian(appctx.ts, 0.0, u, appctx.SEMop.stiff, appctx.SEMop.stiff, &appctx)); in main()
212 PetscCall(MatAXPY(appctx.SEMop.stiff, -1.0, appctx.SEMop.advec, DIFFERENT_NONZERO_PATTERN)); in main()
213 PetscCall(MatDuplicate(appctx.SEMop.stiff, MAT_COPY_VALUES, &appctx.SEMop.keptstiff)); in main()
217 PetscCall(MatSetNullSpace(appctx.SEMop.stiff, nsp)); in main()
218 PetscCall(MatNullSpaceTest(nsp, appctx.SEMop.stiff, NULL)); in main()
237 …PetscCall(TSSetRHSJacobian(appctx.ts, appctx.SEMop.stiff, appctx.SEMop.stiff, TSComputeRHSJacobian… in main()
266 PetscCall(MatDestroy(&appctx.SEMop.stiff)); in main()
H A Dburgers_spectral.c67 Mat stiff; /* stiffness matrix */ member
190 PetscCall(DMCreateMatrix(appctx.da, &appctx.SEMop.stiff)); in main()
197 …PetscCall(RHSMatrixLaplaciangllDM(appctx.ts, 0.0, u, appctx.SEMop.stiff, appctx.SEMop.stiff, &appc… in main()
205 PetscCall(MatDuplicate(appctx.SEMop.stiff, MAT_COPY_VALUES, &appctx.SEMop.keptstiff)); in main()
209 PetscCall(MatSetNullSpace(appctx.SEMop.stiff, nsp)); in main()
211 PetscCall(MatNullSpaceTest(nsp, appctx.SEMop.stiff, NULL)); in main()
234 …PetscCall(TSSetRHSJacobian(appctx.ts, appctx.SEMop.stiff, appctx.SEMop.stiff, RHSJacobian, &appctx… in main()
257 PetscCall(MatDestroy(&appctx.SEMop.stiff)); in main()
/petsc/src/ts/tutorials/ !
H A Dex50.c59 Mat stiff; /* stiffness matrix */ member
172 PetscCall(DMCreateMatrix(appctx.da, &appctx.SEMop.stiff)); in main()
179 …aplaciangllDM(appctx.ts, 0.0, appctx.dat.curr_sol, appctx.SEMop.stiff, appctx.SEMop.stiff, &appctx… in main()
187 PetscCall(MatDuplicate(appctx.SEMop.stiff, MAT_COPY_VALUES, &appctx.SEMop.keptstiff)); in main()
191 PetscCall(MatSetNullSpace(appctx.SEMop.stiff, nsp)); in main()
193 PetscCall(MatNullSpaceTest(nsp, appctx.SEMop.stiff, NULL)); in main()
215 …PetscCall(TSSetRHSJacobian(appctx.ts, appctx.SEMop.stiff, appctx.SEMop.stiff, RHSJacobian, &appctx… in main()
226 PetscCall(MatDestroy(&appctx.SEMop.stiff)); in main()
/petsc/doc/manual/ !
H A Dts.md339 For “stiff” problems or those with multiple time scales $F()$ will
340 be treated implicitly using a method suitable for stiff problems and
379 - stiff ODE
382 - stiff ODE with mass matrix
385 - stiff-nonstiff ODE
388 - stiff-nonstiff ODE with mass matrix
398 …it stages, the order/stage-order, the implicit stability properties (IM), stiff accuracy (SA), the…
527 …the scheme order and stage order, the implicit stability properties (IM), stiff accuracy (SA), the…
1314 and the Theta methods (for stiff DAEs)
/petsc/share/petsc/datafiles/meshes/ !
H A Dtestcase3D.cas4776 (species/surf-stiff-chem-method 1)
4777 (hetero-stiff-chem? #f)
4778 (stiff-chem-tau -0.1)
4779 (species/stiff-chem-dt-ss-user? #t)
4780 (stiff-chem-dt-ss 1e-05)
4781 (stiff-chem-seg-dt 0.1)
4782 (stiff-chem-seg? #f)
4783 (stiff-solver/temp-time-redux 0.25)
4784 (stiff-solver/chem-time-ratio 0.9)
4785 (stiff-solver? #f)
[all …]
/petsc/doc/ !
H A Dpetsc.bib55 …eralized {R}unge--{K}utta methods of order four with stepsize control for stiff ordinary different…
98 title = {Diagonally implicit {R}unge--{K}utta methods for stiff {ODE}s},
11355 title = {Benchmarking stiff {ODE} solvers for atmospheric chemistry problems {II}:
11365 task is the integration of the stiff systems of ordinary differential equations
11367 systematically search for stiff solvers which can be identified as close to
11392 title = {Improved traditional {R}osenbrock--{W}anner methods for stiff {ODE}s and {DAE}s},
20085 title = {Experiments with quasi-{N}ewton methods in solving stiff {ODE} systems},
39662 …title = {A non-stiff summation-by-parts finite difference method for the scalar wave equation in…