OOF2: The Manual

`Periodic (PeriodicBC)`
	6.5.2. Subclasses

Name

Periodic (PeriodicBC) — Set the values of a field to be equal along two opposite boundaries.

Synopsis

PeriodicBC(field, equation, boundary)

Details

Base class: BC
Parameters:

field

Type: A Field object.

equation

Type: An Equation object which can be used in boundary conditions.

boundary

Pair of periodic edge boundaries to which this condition applies Type: A string containing the names of two periodic edge boundaries in a mesh, separated by a space.

Description

Periodic boundary conditions set the values of a component of a Field on a periodic pair of exterior edge boundaries to be the same. One boundary condition applies to all components of a Field. The value for the boundary parameter must be a string containing the names of two boundaries that constitute a periodic pair: the appropriate periodicity option must have been chosen when the Skeletonwas created in the Skeleton task page and the directions of the boundaries must be opposite. By default, the left and right boundaries will constitute a valid pair if left_right_periodicity was chosen when the skeleton is created, as will the top and bottom boundaries, if top_bottom_periodicity was chosen. The GUI presents a pull down menu listing the legal strings, but users of the text interface will need to know the possible values.

The field and equation parameters are the same as those for Dirichlet boundary conditions. See that discussion for details. Note that periodic boundary conditions do not have profile or component parameters.


`Periodic (Periodic)`		`Picard (Picard)`