# How to output gas mass flow rate

**URL:** https://discourse.paraview.org/t/how-to-output-gas-mass-flow-rate/14936
**Category:** ParaView Support
**Tags:** vtk
**Created:** [June 27, 2024, 9:17am UTC](https://discourse.paraview.org/t/how-to-output-gas-mass-flow-rate/14936 "2024-06-27T09:17:10Z")
**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: [June 27, 2024, 9:17am UTC](https://discourse.paraview.org/t/how-to-output-gas-mass-flow-rate/14936/1 "2024-06-27T09:17:10Z")

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Excuse me, researcher. I have some VTK files about biomass pyrolysis. I want to output the distribution of the mass flow rate of tar and gas at a certain section(the unit of mass flow rate is kg/s). How should I proceed?  
[VTK.zip](https://discourse.paraview.org/uploads/short-url/RNxrX68DzdbH0s7rPQy5x5lAmh.zip) (3.5 MB)