Falling Knot

A loose trefoil knot, tied on a perfectly floppy rope and submerged in a high viscosity fluid, starts falling. As one can see, initially the gravitational force tightens the knot, but as soon as it becomes closely packed, it makes the knot to slip down the rope. Notice the particular rolling motion that allows the knot to move down. Obviously, this is but an animation obtained from a numerical simulation. The simulation program was developed by Piotr Pieranski at the Department of Technical Physics, Poznan University of Technology.

Category:

Science & Technology

Tags:

• knot
• trefoil
• gravity
• simulation
• Pieranski

[WhereDoesItAllEnd]

Wow, slippery rope! That's really good! Well done!!

[av733]

ooo