DirichletBC

Parameters

• Required:

  • boundary ([String, …]) - Boundary name

  • value ([String, …]) - Function expression to evaluate.

• Optional:

  • field (String) - Field name

  • value_t ([String, …]) - Time derivative of the ‘value’ parameter.

class DirichletBC : public godzilla::EssentialBC, protected godzilla::FunctionInterface

Dirichlet boundary condition.

Can be used only on single-field problems

Public Functions

virtual void create() override

Called to construct the object.

virtual void set_up() override

Set up this boundary condition.

virtual const std::vector<Int> &get_components() const override

Get the component numbers this boundary condition is constraining.

Returns:

Vector of component numbers

virtual void evaluate(Real time, const Real x[], Scalar u[]) override

Evaluate the boundary condition.

Parameters:

• time – The time at which to sample

• x – The coordinates

• u – The output field values

virtual void evaluate_t(Real time, const Real x[], Scalar u[]) override

Evaluate time derivative of the boundary condition.

Parameters:

• time – The time at which to sample

• x – The coordinates

• u – The output field values