|Index:||39 or 45|
There is typically one zone section for each zone referenced by the grid. Although some grid zones may not have corresponding zone sections, there cannot be more than one zone section for each zone.
A zone section has the following form:
(39 (zone-id zone-type zone-name domain-id)( (condition1 . value1) (condition2 . value2) (condition3 . value3) . . . ))
(39 (zone-id zone-type zone-name domain-id)())
Here the zone-id is in decimal format. This is in contrast to the use of hexadecimal in the grid sections. The zone-type is one of the following:
axis exhaust fan fan fluid inlet vent intake fan interface interior mass-flow-inlet outlet vent outflow periodic porous-jump pressure-far-field pressure-inlet pressure-outlet radiator shadow solid symmetry velocity-inlet wall
The interior, fan, porous-jump, and radiator types can be assigned only to zones of faces inside the domain. The interior type is used for the faces within a cell zone; the others are for interior faces that form infinitely thin surfaces within the domain. FLUENT allows the wall type to be assigned to face zones both on the inside and on the boundaries of the domain. Some zone types are valid only for certain types of grid components. For example, cell (element) zones can be assigned only one of the following types:
All of the other types listed above can be used only for boundary (face) zones. The zone-name is a user-specified label for the zone. It must be a valid Scheme symbol B.1 and is written without quotes. The rules for a valid zone-name (Scheme symbol) are as follows:
! $ % & * / : < = > ? ~ _ ^
. + -
Some examples of zone sections produced by grid generators and preprocessors are as follows:
(39 (1 fluid fuel 1)()) (39 (8 pressure-inlet pressure-inlet-8 2)()) (39 (2 wall wing-skin 3)()) (39 (3 symmetry mid-plane 1)())
The domain-id is an integer that appears after the zone name, associating the boundary condition with a particular phase or mixture (sometimes referred to as phase-domains and mixture-domains).