Description

ANSYS Fluent export supports 2D and 3D grids of all cell types that can be created in Pointwise.

 

Caution: Left-handed blocks are not considered valid in ANSYS Fluent. So you may want to examine the orientation of your blocks using the Edit, Orient command before the blocks are exported.

Two-dimensional grids are assumed to lie in the x-y plane. Normals for 2D grids must point in the positive z-direction.

 

Note: When exporting a 2D grid to ANSYS Fluent, always make sure that the grid normals point in the positive z-direction. Otherwise, your grid cells may be viewed as having negative Jacobians within ANSYS Fluent.

Any baffle domains which have CAE boundary conditions assigned to the Fan, Interior, Jump, Porous, or Radiator types will not have their grid points cloned or "inflated" at export. On the other hand, baffle domains assigned to boundary conditions of any other type will have their points cloned.

For ANSYS Fluent export, blocks with common CAE volume conditions are automatically merged in the CAE file with the VC used as the zone name. To have separate blocks written out with assigned VCs, set a different VC to each block to avoid automatic merge. Alternatively, setting block VCs to Unspecified will cause the blocks to be exported separately under their block names.

The ASCII file format and Single or Double precision can be used for export.

During export, when Pointwise detects a pole (line singularity) in a structured grid, it will convert the cell from a hex (quad) to a wedge (triangle) (shown below).

Fluent Wedge Element
Wedge or prism-shaped blocks will be exported with a combination of hexahedral and triangular cells to ANSYS Fluent.

For situations in which a structured block topology contains a completely singular face (point singularity), Pointwise will convert hexes to pyramids (shown below).

Fluent Pyramid Element
Pyramid-shaped structured blocks will be exported with a combination of hexahedral and pyramid cells to ANSYS Fluent.

Structured block topologies that contain one completely singular (degenerate) edge (shown below) are not supported for ANSYS Fluent export. If this topology is detected during export of the CAE file, Pointwise will stop export with an error message referencing the unsupported block topology.

Fluent Degenerate Element
A structured block containing a degenerate edge is not supported for export to ANSYS Fluent.