Solution for Fluent Meshing Error about Point Contact
Problem Overview
In CFD modeling, there are situations where two surfaces have a single-point contact.
For example, in the spherical computational domain shown below, there are baffle surfaces marked in yellow and pink, respectively. The contact region between them is a single point, not a curve.
The surface of above geometry model can be correctly meshed.
However, during the volume mesh generation stage, the following error message appears:
This error directly causes the volume mesh generation to fail.
Solution
Method 1: Tetrahedral Filling
Fluent Meshing default method is polyhedral elements, which cannot handle geometries with point contacts. Tetrahedral elements can accommodate such point contact geometries.
Image
Method 2: Modification in the Geometry Model
Use the diagnostic tools in Fluent Meshing.
Select the point contact diagnosis.
Click the “Mark” button to display the point contact areas, which are highlighted in magenta in the corresponding element map.
Click the “Summary” button to view all issues found during the diagnosis in the command line.