MultiStageScheme

class dolfin.cpp.fem.MultiStageScheme(*args)

Bases: dolfin.cpp.common.Variable

Place-holder for forms and solutions for a multi-stage Butcher tableau based method.

Constructor.

Parameters:

• std::vector< std::shared_ptr< const Form >>> stage_forms (std::vector<) –
• const Form > last_stage (std::shared_ptr<) –
• std::shared_ptr< Function > > stage_solutions (std::vector<) –
• Function > u (std::shared_ptr<) –
• Constant > t (std::shared_ptr<) –
• Constant > dt (std::shared_ptr<) –
• double > dt_stage_offset (std::vector<) –
• int > jacobian_indices (std::vector<) –
• int order (unsigned) –
• std::string name (const) –
• std::string human_form (const) –
• std::shared_ptr< const DirichletBC >> bcs (std::vector<) –

bcs()

Return boundary conditions.

Return type:std::vector< std::shared_ptr< const DirichletBC > >

dt_stage_offset()

Return local timestep.

Return type:const std::vector< double > &

implicit()

Return true if stage is implicit.

Parameters:int stage (unsigned) – Return type:bool

jacobian_index()

Return a distinct jacobian index for a given stage if negative the stage is explicit and hence no jacobian needed.

Parameters:int stage (unsigned) – Return type:int

order()

Return the order of the scheme.

Return type:unsigned int

thisown

The membership flag