# The nonlinear term of Navier-Stokes by DG method

**URL:** https://community.freefem.org/t/the-nonlinear-term-of-navier-stokes-by-dg-method/3908
**Category:** General Discussion
**Created:** [May 10, 2025, 9:09am UTC](https://community.freefem.org/t/the-nonlinear-term-of-navier-stokes-by-dg-method/3908 "2025-05-10T09:09:36Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![LXX](https://avatars.discourse-cdn.com/v4/letter/l/258eb7/32.png) [@LXX](https://community.freefem.org/u/LXX)
#### Post date: [May 10, 2025, 9:09am UTC](https://community.freefem.org/t/the-nonlinear-term-of-navier-stokes-by-dg-method/3908/1 "2025-05-10T09:09:36Z")

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![image](https://canada1.discourse-cdn.com/flex030/uploads/freefem/original/2X/f/f7d946e47850ef2b0daa2c4465ba338952215c43.png)  
Hello, everyone. Right now I’m trying to write DG code using FreeFem++, but when calculating the boundary integrals on the nonlinear terms of the navier-stokes equation, I’m running into problems that I can’t represent