# How to integrate data individually over a repeated array of surfaces?

**URL:** https://discourse.paraview.org/t/how-to-integrate-data-individually-over-a-repeated-array-of-surfaces/16984
**Category:** ParaView Support
**Created:** [July 19, 2025, 1:46pm UTC](https://discourse.paraview.org/t/how-to-integrate-data-individually-over-a-repeated-array-of-surfaces/16984 "2025-07-19T13:46:36Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Dan\_Kam](https://discourse.paraview.org/user_avatar/discourse.paraview.org/dan_kam/32/16745_2.png) [@Dan\_Kam](https://discourse.paraview.org/u/Dan_Kam)
#### Post date: [July 19, 2025, 1:46pm UTC](https://discourse.paraview.org/t/how-to-integrate-data-individually-over-a-repeated-array-of-surfaces/16984/1 "2025-07-19T13:46:36Z")

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Hello,

I have grouped multiple surfaces (i have 36 of them that come in an array like geometry, think of multiple cylinders in a row) using GroupedDatasets and selected them using Extract Block.

I use integrate variables to integrate the heat flux over each cylinder, hoping to have a sheet with each cylinder integral in a row, but although I have the grouped blocks, im getting the integral over all the surfaces, and doing it surface by surface is a pain.

How can I proceed?

Thank you!

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [July 21, 2025, 8:26am UTC](https://discourse.paraview.org/t/how-to-integrate-data-individually-over-a-repeated-array-of-surfaces/16984/2 "2025-07-21T08:26:16Z")

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Please share your data.