vk.com/club152685050Using Overset and Dynamic| vkMeshes.com/id446425943

The mesh check fails with a warning. The warning states that there is an overset zone that is not a part of any overset interface. If any zone already has overset type, we need to define overset-interface with available overset zone. If mesh does not have any overset type predefined, then this warning will not come.

Note

Fluent performs various checks on the mesh and reports the progress in the console window. Pay attention to the reported minimum volume and make sure this is a positive number.

12.5. Overset Interface Creation

1.Organize the boundary conditions by type.

Setup → Boundary Conditions Group By → Zone Type

2.In this step you will ensure that the component boundary is properly defined as the overset boundary type.

Setup → Boundary Conditions → Overset → overset_boundary Type → overset

You can also use following TUI command to change overset_boundary to the overset type:

vk.com/club152685050Using Overset and Dynamic| vkMeshes.com/id446425943

/define/boundary-conditions/zone-type overset_boundary overset

Note

ANSYS Meshing automatically assigns boundary types according to boundary names. Meshes created in other meshing tools may require you to manually define all of the boundary types.

3.Define Overset Interface.

Domain → Interfaces → Overset...

This opens the Create/Edit Overset Interfaces dialog box.

a.Enter overset-interface for Name.

b.Select fluid-background from the Background group box and component from the Component group box.

c.Click Create to create the overset interface.

d.Close the Create/Edit Overset Interfaces dialog box.

4.Repeat the mesh check to confirm that it is successful.

Domain → Mesh → Check → Perform Mesh Check

5.Define overset settings for creating an efficient interface.

Set the donor-priority-method to boundary-distance-based. This option is only available through the TUI command:

/define/overset-interfaces/options/donor-priority-method 1

While establishing overset interface, Fluent does an optimization to get best location of the interface while reducing the number of cells in the overlapping region that will participate in the calculation.

There are options to define the priority of the cell zones that will take part in the overset interface creation. Zones defined as higher priority will be given more weightage. When cell zones have the same priority, there are two methods that govern overlap minimization (see Overlap Minimization in the Fluent User's