Chaste Commit::ca8ccdedf819b6e02855bc0e8e6f50bdecbc5208
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#include <SimplePetscNonlinearSolver.hpp>
Public Member Functions | |
Vec | Solve (PetscErrorCode(*pComputeResidual)(SNES, Vec, Vec, void *), PetscErrorCode(*pComputeJacobian)(SNES, Vec, Mat *, Mat *, MatStructure *, void *), Vec initialGuess, unsigned fill, void *pContext) |
Public Member Functions inherited from AbstractNonlinearSolver | |
virtual | ~AbstractNonlinearSolver () |
Concrete Simple Nonlinear PDE system solver.
Definition at line 46 of file SimplePetscNonlinearSolver.hpp.
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virtual |
Simple Nonlinear PDE system solver, uses the PETSc SNES Solver, which uses Newton's method.
pComputeResidual | points to the function which computes the residual, it must take arguments SNES (a PETSc nonlinear solver object), Vec (current guess - a vector of the correct size), Vec (a Vec of the correct size in which the residual is returned), void* (a pointer to anything you may need to refer to when calculating the residual) |
pComputeJacobian | points to the function which computes the Jacobian. Before PETSc 3.5 it took arguments SNES (a PETSc nonlinear solver * object), Vec, Mat* (a pointer to the Jacobian matrix), Mat* (a pointer to a preconditioner matrix), MatStructure* (points to the PETSc matrix type e.g. AIJ), void* (a pointer to anything you may need to refer to when calculating the residual). For PETSc 3.5+ this became SNES, Vec, Mat, Mat, void*. |
initialGuess | A PETSc Vec of the correct size, containing initial guesses for the nonlinear solver. |
pContext | [optional] A pointer to a class that may have to be used in the ComputeResidual and ComputeJacobian functions |
fill | the expected maximum number of nonzeros in a row of the Jacobian matrix |
To be used in the form: Vec answer=solver->Solve(&ComputeResidual, &ComputeJacobian, initialGuess, NULL);
In the same file, but outside this class the functions ComputeResidual and ComputeJacobian must sit, using the input arguments specified above.
Concrete Simple Nonlinear PDE system solver.
Implements AbstractNonlinearSolver.
Definition at line 46 of file SimplePetscNonlinearSolver.cpp.
References CHASTE_PETSC_NULLPTR, PetscTools::Destroy(), EXCEPTION, PETSC_DESTROY_PARAM, and PetscTools::SetupMat().