If your multiple-zone grid includes non-conformal boundaries, check if the grid meets all the requirements listed in Section
6.4.2). This ensures that
FLUENT can obtain a solution on the mesh. Then do the following:
Read the grid into
FLUENT. If you have multiple grid files that have not yet been merged, first follow the instructions in Section
6.3.15 to merge them into a single grid.
After reading in the grid, change the type of each pair of zones that comprises the non-conformal boundary to
interface (as described in Section
Enter a name for the interface in the
Grid Interface field.
Specify the two interface zones that comprise the grid interface by selecting one or more zones in the
Interface Zone 1 list and one or more zones in the
Interface Zone 2 list.
If one of your interface zones is much smaller than the other, you should specify the smaller zone as
Interface Zone 1 to improve the accuracy of the intersection calculation.
Interface Type, if appropriate. There are two options:
Periodic for periodic problems.
Periodic is not a valid option when more than one zone is selected in each
Coupled if the interface lies between a solid zone and a fluid zone, or if you would like to model a (thermally) coupled wall between two fluid zones using non-conformal interfaces.
Create to create a new grid interface. For all types of interfaces,
FLUENT will create boundary zones for the interface (e.g.,
wall-10), which will appear under
Boundary Zone 1 and
Boundary Zone 2. If you have enabled the
FLUENT will also create wall interface zones (e.g.,
wall-4-shadow), which will appear under
Interface Wall Zone 1 and
Interface Wall Zone 2.
If the two interface zones did not overlap entirely, check the boundary zone type of the zone(s) created for the non-overlapping portion(s) of the boundary. If the zone type is not correct, you can use the
Boundary Conditions panel to change it.
If you have any
Coupled type interfaces, define boundary conditions (if relevant) by updating the interface wall zones in the
Boundary Conditions panel.
If you create an incorrect grid interface, you can select it in the
Grid Interface list
and click the
Delete button to delete it. Any boundary zones or wall interface zones that were created when the interface was created will also be deleted. You may then proceed with the problem setup as usual.