# Viscous Dissipation

**URL:** <https://community.freefem.org/t/viscous-dissipation/1788>\
**Category:** General Discussion\
**Created:** [May 29, 2022, 6:02pm UTC](https://community.freefem.org/t/viscous-dissipation/1788 "2022-05-29T18:02:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![D\_N\_Sarkar](https://avatars.discourse-cdn.com/v4/letter/d/0ea827/32.png) [@D\_N\_Sarkar](https://community.freefem.org/u/D_N_Sarkar)\
**Post date:** [May 29, 2022, 6:02pm UTC](https://community.freefem.org/t/viscous-dissipation/1788/1 "2022-05-29T18:02:24Z")

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How to calculate viscous dissipation (due to fluid flow) in FreeFEM?

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**Author:** ![frederichecht](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/frederichecht/32/15_2.png) [@frederichecht](https://community.freefem.org/u/frederichecht)\
**Post date:** [June 7, 2022, 3:22pm UTC](https://community.freefem.org/t/viscous-dissipation/1788/2 "2022-06-07T15:22:47Z")

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You have before to choose what is exactly for you viscous dissipation,  
and after approximate !