ABAQUS Keywords Reference Manual  

*FLUID EXCHANGE
Define fluid exchange.

This option is used to define fluid exchange between two fluid cavities or between a fluid cavity and its environment.

Product: ABAQUS/Explicit  

Type: Model data

Level: Model  

References:

Required parameters:

NAME

Set this parameter equal to a name that will be used to refer to the fluid exchange definition.

PROPERTY

Set this parameter equal to the name of the *FLUID EXCHANGE PROPERTY option defining the fluid exchange property.

Optional parameters:

EFFECTIVE AREA

Set this parameter equal to the total orifice area or the total effective area.

The default value is 1.0 if a surface is not specified. Otherwise, the default value is equal to the area of the surface. If both the effective area and a surface are specified, the area of the surface is ignored.

SURFACE

Set this parameter equal to the name of the surface representing the orifice or effective area. If this parameter is omitted, the value specified with the EFFECTIVE AREA parameter is used for the orifice or effective area.

Data line to define the fluid exchange: 

First (and only) line:

  1. First reference node number of fluid cavity.

  2. Optional second reference node number of fluid cavity. If only one node is specified, fluid exchange will occur between the fluid cavity and its environment.