[asda3D]

Hi everyone I am currently writing up a thesis due in just under 2 months.
I am writing up my mesh sensitivity study that I have conducted. I am unsure if I should put this in my results and discussion section or if I should put it in my CFD setup section (included simplifying RANS, creating geometry and generating mesh through y plus).

Any recommendations much appreciated

[praphul]

It's better to put the mesh sensitivity study at CFD setup section. You can also mention about grid independence study (1-2 sentences) in the preamble of the result section that the results were taken for the optimum grid as found from mesh sensitivity study.

[asda3D]

Thank you praphul
I will take on board what you said

[LuckyTran]

There's really no such thing as grid independence, only grid sensitivity. Your grid sensitivity is a very important metric. It's analogous to your experimental uncertainty.


Would you report the uncertainty of a derived result while describing how you recorded measurements? Not usually...

[Svetlana]

This could go to a separate verification & validation section if you like as well, or a subsection like that in the results section. I would suggest to check other CFD theses at your university, they can be available in the library in electronic format.

For mesh sensitivity I would suggest looking at "H-convergence plot" and "Grid Convergence Index" if you have not done so already.

[asda3D]

Thank you for that!!!
I will access the library to see which layouts have been used in previous theses

[FMDenaro]

This part should be organized in the results section. Depending on the type of solution, a grid can be refined to explore the order of accuracy (if you have an analytical solution) or to explore the independence of the solution after a certain grid resolution is reached. If you are solving modelled equation for turbulence that could be further extended to address the sensitivity of the model.
You should provide more details to understand the topic you have to write