# How to build a ring model？

**URL:** <https://fenicsproject.discourse.group/t/how-to-build-a-ring-model/11739>\
**Category:** General\
**Created:** [July 14, 2023, 11:01pm UTC](https://fenicsproject.discourse.group/t/how-to-build-a-ring-model/11739 "2023-07-14T23:01:55Z")\
**Posts on this page:** 1\
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**Author:** ![violetus](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/violetus/32/5122_2.png) [@violetus](https://fenicsproject.discourse.group/u/violetus)\
**Post date:** [July 15, 2023, 1:41pm UTC](https://fenicsproject.discourse.group/t/how-to-build-a-ring-model/11739/7 "2023-07-15T13:41:54Z")

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Okay, I suggest you to kindly go through this post [How to use gmsh tags to assign material properties?](https://fenicsproject.discourse.group/t/how-to-use-gmsh-tags-to-assign-material-properties/9249) which is probably what you are looking for.

EDIT: You can also use boundary conditions to define different material properties like in this tutorial -  
[Defining subdomains for different materials](https://fenicsproject.org/pub/tutorial/html/._ftut1013.html).

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