Inactive Nodes Card (CO2E)

This card is used to declare inactive nodes within the computational domain. Inactive nodes are those nodes that will remain permanently excluded from the computational domain. Because inactive nodes reduce the number of unknowns and, therefore, increase execution speed, their use is recommended. Inactive nodes can be used to simulate irregular boundaries or define impervious zones. Inactive nodes can also be used to define internal boundary surfaces. Boundary conditions may be applied to any surface between an active and inactive node. Boundary condition definitions, however, must refer to an active node. Examples of appropriate uses for inactive nodes include representation of the atmosphere above a sloping surface, or conversely, a non-horizontal water table along the bottom of a domain.

• Descriptions of the inactive nodes options (i.e., explicit declaration, external files, rock/soil type association, and multiple entries) are provided on the Card Options page.

• Formatting instructions for specifying inactive nodes are provided on the Card Syntax page.

• Examples of Inactive Nodes Cards for STOMP-CO2E are provided on the Card Examples page.