NonlinearProblem

class NonlinearProblem : public godzilla::Problem, public godzilla::RestartInterface

Nonlinear problem.

Subclassed by godzilla::ExplicitDGLinearProblem, godzilla::ExplicitFVLinearProblem, godzilla::FENonlinearProblem

Public Functions

virtual void create() override

Called to construct the object.

virtual void run() override

Run the problem.

virtual void write_restart_file(RestartFile &file) const override

Write restart file.

Parameters:

file – File to write restart data to

virtual void read_restart_file(const RestartFile &file) override

Read restart file.

Parameters:

file – File to read restart data from

KrylovSolver get_ksp() const

Get underlying KSP.

void set_ksp_operators(const Matrix &A, const Matrix &B)

Set KSP operators.

const Matrix &get_jacobian() const

Get Jacobian matrix.

bool converged()

true if solve converged, otherwise false

void set_use_matrix_free(bool mf_operator, bool mf)

Use matrix free finite difference matrix vector products to apply the Jacobian.

Parameters:

• mf_operator – use matrix-free only the A matrix

• mf – use matrix-free for both the A and P matrices

virtual void pre_solve()

Called before the solve.

void solve()

Solve the problem.

virtual void post_solve()

Called after the solve.