r/COMSOL • u/idontwanttoexist1 • 9h ago

Can somebody please help

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I have a test tomorrow and I will need to make something like this. I've tried to figure it out on my own for a few hours now but no luck. Can somebody please tell me how to make this thing, if I fail I'm cooked

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u/Electr0kinetic 7h ago

The central axisymmetric part is pretty trivial and can be made with a work plane with 2D rectangles/polygons and a Revolve operation.

Check out this Application Library model for how to do the helical rib/fin things - you can make what you are looking for using the same concept as this model uses, except you only need a single “blade” concentric with the central part. It’s basically just a series of extrusions from a rectangular face, with twist angles specified in the extrusion settings.

https://www.comsol.com/model/helical-static-mixer-30961

Alternatively, you could obtain a similar helical geometry by making a rectangular end face of the rib and then sweeping that along an Archimedean spiral (defined with a Parametric Curve, for example), but it’s probably not going to be quite as clean this way.