# Navier Stokes and Convection Diffusion **URL:** \ **Category:** variational formulation\ **Created:** [November 26, 2021, 4:22pm UTC](https://fenicsproject.discourse.group/t/navier-stokes-and-convection-diffusion/7170 "2021-11-26T16:22:44Z")\ **Posts on this page:** 1\ **Showing post:** 7
**Author:** ![JoelTomasek](https://yyz2.discourse-cdn.com/free1/user_avatar/fenicsproject.discourse.group/joeltomasek/32/2302_2.png) [@JoelTomasek](https://fenicsproject.discourse.group/u/JoelTomasek)\ **Post date:** [November 27, 2021, 8:12pm UTC](https://fenicsproject.discourse.group/t/navier-stokes-and-convection-diffusion/7170/7 "2021-11-27T20:12:23Z")
Actually, with a higher mesh density and a finer timestep I got a working code. Thank you so much for your help. The reason I was undertaking this exercise, is to obtain a MWE for my previous post ([Strain history in Newtonian flow](https://fenicsproject.discourse.group/t/strain-history-in-newtonian-flow/7169)). My aim is to implement the frobenius norm of the strain as a source term in the convection diffusion equation. In the previous post I referred to the Oasis solver without a MWE, so it would be difficult for anyone to answer my questions or to figure out the problem myself. I will give this implementation another attempt and maybe resubmit my question regarding “Strain history in convection diffusion equation” if I do not succeed. --- _[View the full topic](https://fenicsproject.discourse.group/t/navier-stokes-and-convection-diffusion/7170)._