Eternal Gardens Journal

Da Vinci Notes 12: Water, Vortices and the Falling Jet

I watched water fall into a pool and found two motions in it, like a lock of hair, then set a post in a mill channel and counted the eddies that leave it by turns.

Leonardo studies the falling jet, compares water to hair, and draws the eddies behind a post that Kármán and Strouhal would later measure and name.

Leonardo da Vinci · November 8, 2026 · 30 min