# Unbounded domain solution of NSE

**URL:** https://community.freefem.org/t/unbounded-domain-solution-of-nse/2050
**Category:** General Discussion
**Created:** [October 10, 2022, 12:16pm UTC](https://community.freefem.org/t/unbounded-domain-solution-of-nse/2050 "2022-10-10T12:16:07Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![gnaganlu](https://avatars.discourse-cdn.com/v4/letter/g/cdc98d/32.png) [@gnaganlu](https://community.freefem.org/u/gnaganlu)
#### Post date: [October 10, 2022, 12:16pm UTC](https://community.freefem.org/t/unbounded-domain-solution-of-nse/2050/1 "2022-10-10T12:16:07Z")

</div>

I need to solve flow past obstacles on the unbounded domain at Freefem. Is it possible? How can I write?

Thank you

---

<div class="post-metadata">

### Author: ![aszaboa](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/aszaboa/32/2918_2.png) [@aszaboa](https://community.freefem.org/u/aszaboa)
#### Post date: [October 10, 2022, 12:33pm UTC](https://community.freefem.org/t/unbounded-domain-solution-of-nse/2050/2 "2022-10-10T12:33:51Z")

</div>

I think a reasonable approximation is that you use a sufficiently large truncated domain for your calculation. If you need a semi-infinite domain, you could use a coordinate transformation to map a semi-infinite domain to a finite one which can be handled by FreeFem.