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# BOUNDARY_CONDITION¶

This card links a particular FLOW_CONDITION and TRANSPORT_CONDITION to the appropriate REGION to define a boundary condition. It is set up similar to the INITIAL_CONDITION card, by first creating a list of flow and/or transport conditions, and then appling them to appropriate REGIONs using this card.

## Required Cards:¶

BOUNDARY_CONDITION <name>
Opens the BOUNDARY_CONDITION block, where <string> is the name of the boundary condition (name is optional).
FLOW_CONDITION <name>
If a FLOW_CONDITION has been defined, specify it here by the given name of the flow condition.
TRANSPORT_CONDITION <name>
If a TRANSPORT_CONDITION has been defined, specify it here by the given name of the transport condition.
REGION <name>
Specifies the name of the REGION that the set of flow and/or transport conditions will be applied to.

## Examples¶

BOUNDARY_CONDITION
FLOW_CONDITION left_face
REGION left_face
/

BOUNDARY_CONDITION recharge
FLOW_CONDITION recharge
TRANSPORT_CONDITION tracer_recharge
REGION Top
/