# Radiation using view factors

**URL:** https://community.freefem.org/t/radiation-using-view-factors/3408
**Category:** General Discussion
**Created:** [July 20, 2024, 4:17pm UTC](https://community.freefem.org/t/radiation-using-view-factors/3408 "2024-07-20T16:17:54Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![PierreAntonetti](https://avatars.discourse-cdn.com/v4/letter/p/f1d935/32.png) [@PierreAntonetti](https://community.freefem.org/u/PierreAntonetti)
#### Post date: [July 20, 2024, 4:17pm UTC](https://community.freefem.org/t/radiation-using-view-factors/3408/1 "2024-07-20T16:17:54Z")

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Hello,

Does anybody already manage to implement the triangle thermal radiation test case using the numerical calculated view factors ?

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/freefem/original/2X/9/929568b32c61cbedb4d9a40fbfc18b0ccd4fc3f3.png)

This example comes from Comsol : [link](https://doc.comsol.com/5.6/doc/com.comsol.help.models.heat.cavity_radiation/models.heat.cavity_radiation.pdf)

Thank for helping

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<div class="post-metadata">

### Author: ![PierreAntonetti](https://avatars.discourse-cdn.com/v4/letter/p/f1d935/32.png) [@PierreAntonetti](https://community.freefem.org/u/PierreAntonetti)
#### Post date: [July 25, 2024, 9:25am UTC](https://community.freefem.org/t/radiation-using-view-factors/3408/2 "2024-07-25T09:25:28Z")

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Nobody deals with radiation with Freefem ?