Issue with Integrating Variables

ParaView Support
1

Hello everyone,

I’m currently experiencing an issue with the ‘Integrate Variables’ function in ParaView (v5.13). It seems that it’s not working as expected.

I am attempting to compute the average of specific variables over a cross-section of a pipe - this data is from a CFD simulation from Ansys CFX and exported in EnSight Gold format. However, the results I’m getting from the ‘Integrate Variables’ function seem unusual. For instance, the volume fraction, which is 1 everywhere according to the info tab, is reported as 0.046 by the ‘Integrate Variables’ function.

I can’t seem to figure out what’s going wrong. Has anyone else experienced this issue or does anyone have any suggestions on what I might be doing wrong? Thanks!

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image1311×544 138 KB

2

Please save the output of ExtractSurface2 and share it here.

3

Thanks Mathieu, here’s the data for volume fraction and velocity. The goal is to calculate the average velocity for this cross-section and I’m using the volume fraction as a sanity check because it should return 1.

slice_01.vtm (1.1 KB)

4

please share the .vtp files too.

5

I see. Apologies, I’m not familiar with sharing this file format. This should be everything :slight_smile:

slice_01_0_0.vtp (23.1 KB)
slice_01_7_0.vtp (4.3 KB)
slice_01.vtm (1.1 KB)

6

IntegrateVariable divide the integration result by the total surface.

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7

Ah, seems obvious now. Thanks Mathieu!

1 Like