STOMP

Inactive Nodes Card (HYDT-KE)

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. To facilitate user input, a number of features have been incorporated into this card: explicit declaration, external files, rock/soil type association, and multiple entries. Using explicit declaration the user declares domains of nodes as being inactive. Declaring inactive nodes via external files can be useful when the inactive nodes domains are automatically generated. As with the external files option, the rock/soil type association can be useful when the rock/soil zonation has been entered via external files. As no rock/soil types are defined for IJK Indexing, rock/soil type association is not recognized in conjunction with IJK Indexing. The multiple entries option allows a combination of input options on a single Inactive Nodes Card (e.g., explicit declaration and rock/soil type association).

 

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