# 如何处理点接触导致的 Fluent Meshing 错误？

**URL:** <https://www.cax.do/t/how-to-handle-fluent-meshing-errors-caused-by-point-contact/151>\
**Category:** Fluid\
**Tags:** fluent\
**Created:** [2024 年11 月 13 日 13:31 UTC](https://www.cax.do/t/how-to-handle-fluent-meshing-errors-caused-by-point-contact/151 "2024-11-13T13:31:46Z")\
**Posts on this page:** 1\
**Page:** 1

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作者： ![Max](https://www.cax.do/user_avatar/www.cax.do/max/32/257_2.png) [@Max](https://www.cax.do/u/Max)\
发布日期： [2024 年11 月 13 日 13:31 UTC](https://www.cax.do/t/how-to-handle-fluent-meshing-errors-caused-by-point-contact/151/1 "2024-11-13T13:31:46Z")

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**Problem Overview**

In CFD modeling, geometry processing sometimes encounters cases where two surfaces are only in point contact.

For example, as shown in the figure below, inside a spherical computational domain, there are suspended internal surfaces marked in yellow and pink, with their contact area limited to a single point rather than a line.

 ![image](https://www.cax.do/uploads/default/original/1X/114a316a1b33f195a4c6652527ba98406cd362af.jpeg)

The above geometry can be successfully imported into Fluent Meshing and surface meshing can be completed.

 ![image](https://www.cax.do/uploads/default/original/1X/8fd3fdb9c792c9fd179731b4751f26ddd320c1b1.jpeg)

However, the following error appears during volume meshing:

 ![image](https://www.cax.do/uploads/default/original/1X/b00418208f0d02bf82256f00aeb3ccc1fc946a37.png)

This error prevents the generation of a volume mesh.

**Solution**

**Method 1: Tetrahedral Filling**

Fluent Meshing uses polyhedral cells by default, which cannot handle geometries with point contact. Tetrahedral cells, however, allow for such point contact configurations.

 ![image](https://www.cax.do/uploads/default/original/1X/0d637dcd4ff28fb39511243c8f316e800607670d.jpeg)

Pure tetrahedral filling.

 ![image](https://www.cax.do/uploads/default/original/1X/ff3f5fbdbedfc25f26958b1ad4a23bc50517d187.jpeg)

Tetrahedral-hexahedral core filling.

**Method 2: Locate the Point Contact and Modify the Geometry**

1. **Activate Fluent Meshing’s Diagnostic Tool**  

2. **Select Point Contact Diagnostics**  

3. **Click the “Mark” Button** This will display the regions with point contact, highlighted in magenta on the related cells diagram.  

4. **Click the “Summary” Button** This displays a summary of all identified issues in the command line.