How does one model flow with curves, or vectors to mimic velocity (direction and intensity) such as water across a surface Rhino for Mac?

I’d like to create something like this… Please Help?! Any advice would be great! (I assume I could Make2D and add arrows in Illustrator?

_Convert makes curves to lines and could be way.


You’re on Mac, unfortunately, this is a good type of thing to do in Grasshopper… --Mitch

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