The Saffman-Taylor fingering instability was formed in a Hele-Shaw cell (a narrow space between parallel plates) as red India ink was injected into the more viscous Tide laundry detergent.

By Janelle Montoya and Gardner Nichols for Fall 2015 Team Second.
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The Saffman-Taylor fingering instability was formed in a Hele-Shaw cell (a narrow space between parallel plates) as red India ink was injected into the more viscous Tide laundry detergent.

A water balloon is struck by a BB gun. The balloon unzips, water jets forward and back along the BB track, and then the bulk of the water falls.

Two water balloons are shot with a BB gun. The rubber unzips, then the water falls.

Three water balloons are shot with a BB gun. The middle balloon is struck on the front, and moves behind the left balloon before the water falls, recorded in slow motion.

Two water balloons are shot with a BB gun. The rubber unzips, then the water falls, recorded in slow motion

Foam in a soap solution causes thickness variations, shown by thin film interference.

Sugar mixed into a soap solution creates varying thickness in a soap film.

A large bubble filled with stage fog shows colors due to thin film interference.

A large bubble filled with stage fog shows colors due to thin film interference.

A large bubble filled with stage fog pinches off and oscillates to a spherical shape.