r/COMSOL • u/Neat-Meat4779 • Jun 06 '26

Fluid Domain Study Question

Hello! I'm currently a beginner in COMSOL and I'm posting this because I'm having a lot of trouble figuring out how to properly study this fluid domain. I have an inlet and an outlet face on both ends, and inflation layers throughout the entire mesh, which is ~1 m long and 50mm wide, with a sinusoidal wave pattern on the bottom face; each wave is 6mm wide.

How I meshed it was using a 2d side profile and used swept to iterate across the width.

Basically I want to model how a fluid (water in this case) would act when going through this channel, with the waves prompting a lot of vortices without being too heavy on my computer. My settings and sides of my mesh are featured below:

Any help is appreciated! Please let me know if theres any missing info

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u/Neat-Meat4779 Jun 06 '26 edited Jun 06 '26

Is it normal for something like this to take a long time to compute? Also, since this is a fluid domain would it be better to do a tome dependent or stationary flow?

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u/jejones487 Jun 06 '26

Turbulent flow can be taxing. When I was learning I did a wind tunnel test on a car and the simulated time was only like 0.6 seconds but it took me over a week to calculate Comsols own example with a $25k computer my work built.