How to Make a SQUARE Vortex Ring! ft. 3blue1brown

The video features a collaboration with Grant Sanderson to explore vortex rings. Initially, they attempt to create vortex rings through a square hole, predicting various outcomes. The experiment reveals that the square hole produces a wobbling effect, transitioning between square and diamond shapes. The video explains the fluid dynamics behind vortex rings and their wobble, using the Navier-Stokes equation. A laser experiment further visualizes the vortex, leading to new questions. The video concludes with an invitation to explore more on Grant's channel.

Who is the special guest featured in the video?

• Dan

• Grant Sanderson

• Physics Girl

• Math Boy

What was the initial question that distracted the hosts?

• How to make a circular vortex ring?

• What happens if a vortex ring is made through a square hole?

• How to create a vortex ring with colored smoke?

• What is the speed of a vortex ring?

What shape did the vortex ring take when passing through a square hole?

• It became a perfect square

• It turned into a triangle

• It wobbled between a square and a diamond shape

• It remained circular

What happens to the vortex ring when it is formed through a rectangular hole?

• It remains stable

• It turns into a triangle

• It becomes a perfect rectangle

• It wobbles more, forming a C to backward C shape

What is a vortex ring?

• A closed loop of swirling fluid

• A static fluid shape

• A circular motion of fluid around a line

• A straight line of fluid motion

What causes the wobbling effect in a square vortex ring?

• The color of the smoke used

• The air's viscosity

• The size of the vortex

• Sharp turns in the vortex getting ahead

What tool was used to visualize the cross-section of the vortex?

• A smoke machine

• A laser with a diffraction grating

• A magnifying glass

• A camera