# Coulomb interaction

**URL:** <https://fenicsproject.discourse.group/t/coulomb-interaction/14487>\
**Category:** dolfinx\
**Tags:** dolfinx\
**Created:** [April 30, 2024, 12:41am UTC](https://fenicsproject.discourse.group/t/coulomb-interaction/14487 "2024-04-30T00:41:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![TrashPanda](https://avatars.discourse-cdn.com/v4/letter/t/73ab20/32.png) [@TrashPanda](https://fenicsproject.discourse.group/u/TrashPanda)\
**Post date:** [April 30, 2024, 12:41am UTC](https://fenicsproject.discourse.group/t/coulomb-interaction/14487/1 "2024-04-30T00:41:57Z")

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Hi there I’m new to dolfinx and I have been having a lot of fun playing with the demos and learning how to use it.

I was wondering wether or not fenicsx is capable of solving electric field due to point sources. I have a Gaussian bunch with a 1000 electrons each with their own positions and most of the tutorials deal with fields. How would one go about mapping the positions of the point sources onto a mesh grid creating the charge distribution so I can solve the poison equation and hence find the electric field?

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**Author:** ![dokken](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/dokken/32/1560_2.png) [@dokken](https://fenicsproject.discourse.group/u/dokken)\
**Post date:** [April 30, 2024, 4:57am UTC](https://fenicsproject.discourse.group/t/coulomb-interaction/14487/2 "2024-04-30T04:57:39Z")

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Point sources have been covered in: [Point Sources (Redux) - #6 by dokken](https://fenicsproject.discourse.group/t/point-sources-redux/13496/6)