How to Apply Boundary Condition to Only a Part of a Pipe?

Hello everyone,

I’m currently working on my thesis involving finite element analysis, and I’m facing a challenge. I need to apply a boundary condition to only a specific section of a pipe, rather than the entire length. In order to reduce calculation time, i want to replace the fitting as shown in one picture by a BC.

Could anyone provide guidance or tips on how to achieve this? Are there specific tools or methods within the software that can help me isolate that part of the pipe for the boundary condition?

Thank you in advance for your help!

Best regards,
Jonas

You could partition the pipe in CAD software before importing it to PrePoMax. For FreeCAD workflow, see this page: FEM Geometry Preparation and Meshing - FreeCAD Documentation

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Just as a reference for terminology that may be used in other CAD software:

The solution given by FEAnalyst is accomplished in SolidWorks by creating a sketch then using the sketch to create a “split line” on the surface of the part. The effect is to split the surface into two separate surfaces.

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Thanks!
The Solution did work.
With best regards.
Jonas