# Issue with Integrating Variables
**URL:** https://discourse.paraview.org/t/issue-with-integrating-variables/15062
**Category:** ParaView Support
**Created:** [July 16, 2024, 2:52am UTC](https://discourse.paraview.org/t/issue-with-integrating-variables/15062 "2024-07-16T02:52:46Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@swilliams\_KMT](https://discourse.paraview.org/u/swilliams_KMT)
#### Post date: [July 16, 2024, 2:52am UTC](https://discourse.paraview.org/t/issue-with-integrating-variables/15062/1 "2024-07-16T02:52:46Z")
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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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 16, 2024, 6:44am UTC](https://discourse.paraview.org/t/issue-with-integrating-variables/15062/2 "2024-07-16T06:44:58Z")
Please save the output of ExtractSurface2 and share it here.
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### Author:  [@swilliams\_KMT](https://discourse.paraview.org/u/swilliams_KMT)
#### Post date: [July 16, 2024, 7:22am UTC](https://discourse.paraview.org/t/issue-with-integrating-variables/15062/3 "2024-07-16T07:22:58Z")
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](https://discourse.paraview.org/uploads/short-url/5zZHcdBq0VEaQB6k3uUVK5fwaTl.vtm) (1.1 KB)
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 16, 2024, 7:33am UTC](https://discourse.paraview.org/t/issue-with-integrating-variables/15062/4 "2024-07-16T07:33:47Z")
please share the .vtp files too.
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### Author:  [@swilliams\_KMT](https://discourse.paraview.org/u/swilliams_KMT)
#### Post date: [July 16, 2024, 7:48am UTC](https://discourse.paraview.org/t/issue-with-integrating-variables/15062/5 "2024-07-16T07:48:15Z")
I see. Apologies, I’m not familiar with sharing this file format. This should be everything 🙂
[slice\_01\_0\_0.vtp](https://discourse.paraview.org/uploads/short-url/hP8U2OINJZyjpWHHuSSZhVZejfs.vtp) (23.1 KB)
[slice\_01\_7\_0.vtp](https://discourse.paraview.org/uploads/short-url/a87j8RG4AnjbnqW3Yc2jhA2Pxm7.vtp) (4.3 KB)
[slice\_01.vtm](https://discourse.paraview.org/uploads/short-url/5zZHcdBq0VEaQB6k3uUVK5fwaTl.vtm) (1.1 KB)
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 16, 2024, 8:01am UTC](https://discourse.paraview.org/t/issue-with-integrating-variables/15062/6 "2024-07-16T08:01:08Z")
IntegrateVariable divide the integration result by the total surface.
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### Author:  [@swilliams\_KMT](https://discourse.paraview.org/u/swilliams_KMT)
#### Post date: [July 16, 2024, 8:24am UTC](https://discourse.paraview.org/t/issue-with-integrating-variables/15062/7 "2024-07-16T08:24:28Z")
Ah, seems obvious now. Thanks Mathieu!