Dirichlet Boundary Condition

The Dirichlet Boundary Condition specifies a value of u on the boundary of the domain: u = r. By default, it is a unidirectional condition, applying reaction terms on u but not on any variables appearing in r.

Dirichlet Boundary Condition

The Dirichlet boundary condition for each dependent variable (for example, u2), has a corresponding check box (Prescribed values for u2), which is selected by default. Enter a value or expression for the prescribed value in the associated text field or click to clear the check box as needed.

Constraint Settings

To display this section, click the Show button () and select Advanced Physics Options. This section contains settings for specifying the type of constraint and whether to use a pointwise or weak constraint. See Constraint Settings for more information.

You can add subnodes to exclude the constraint from any surrounding boundary, edge, or point. See Excluded Points, Excluded Edges, Excluded Surfaces.

See Coefficient Form PDE for all the settings and Compact and Standard Notations for Classical PDEs for the equations that the Classical PDE interface solve.