How can I fix this triangular mesh error 2331? Feko V 2025.1

srijan12

model.cfx

hello,

I’m getting FEKO error 2331: “Two triangular surface patches overlap” in my antenna model.
It happens when meshing the patch and ground layers in my stacked geometry.
Could someone explain how to fix overlapping surface meshes or misaligned solids in CADFEKO?

Jaehoon

Hello Feko user,

The main reason you have the error 231 is that the parts of the geometry are stacted without using "Union" (under Construct tab).

You can fix the error by simply applying Union all the parts of the geometry as the attached model

(Please note that I reduced the number of the simulation frequencies.)

model_mod.cfx

.

Additionally, you can check the overlapped meshes with the following steps.

1. Open model.out file with a text viewer to check the error message.

2. Display the overlapped Triangle in POSTFEKO using "Find elements" under Mesh tab.

Furthermore, you might reduce the simulation time by changing the metallic cuboids (3D) with a metallic faces (2D), because the faces generates smaller number of the meshes than 3D.

Instead, you need to add a finite metallic medium (like copper = 5.8e7 S/m) and define the metallic faces by using Thickness as shown below.

For this, please start drawing the antenna with 2D parts (Rectangle, circle, ) instead of 3D parts (cuboid, cylinder, etc.) and don't foget to use "Union" in the end.

Please let me know a further question.

Best regards,

Jaehoon