# How to calculate the mass flow rate of gas?

**URL:** https://discourse.paraview.org/t/how-to-calculate-the-mass-flow-rate-of-gas/13554
**Category:** ParaView Support
**Tags:** vtk
**Created:** [December 19, 2023, 1:32am UTC](https://discourse.paraview.org/t/how-to-calculate-the-mass-flow-rate-of-gas/13554 "2023-12-19T01:32:50Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Guanlong](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/g/82dd89/32.png) [@Guanlong](https://discourse.paraview.org/u/Guanlong)
#### Post date: [December 19, 2023, 1:32am UTC](https://discourse.paraview.org/t/how-to-calculate-the-mass-flow-rate-of-gas/13554/1 "2023-12-19T01:32:50Z")

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Hello developers and teachers, I sincerely seek your help on how to calculate the mass flow rate of gas (generated through reactions) on a cross-section. I sincerely hope that you can provide some technical guidance. Thank you very much.  
Best wishes!  
[Case.zip](https://discourse.paraview.org/uploads/short-url/oku02ed2y41yK7tFcGbZRzfWA2W.zip) (2.7 MB)