Hole Stability in Shampoo Vibrated on a Plate

admin — Sun, 28 Jun 2009 12:22:37 +0000

Shampoo is vibrated on a plate at 110Hz. Holes are poked in the shampoo with a puff of air. At low oscillation amplitude, the holes collapse. At an intermediate amplitude, they are stable and persistent. Above a critical oscillation amplitude, the hole delocalizes and acts a seed cell in the formation of a honeycomb structure across the entire plate

Duration : 0:2:22

Technorati Tags: Complex Fluids, Complexity, fluid dynamics, Fluids, Non-newtion fluid, Pattern formation, shampoo, Shear-Thinning

Roll Formation in Shampoo Vibrated on a Plate

admin — Fri, 22 May 2009 07:30:08 +0000

Shampoo, a shear thinning fluid, is vibrated at several frequencies. Above a critical oscillation amplitude, rolls form. The fluid flow is similar to two adjacent Rayleigh-Bernard convection cells with the left one rotating CW and the right one CCW. This video documents the behavior and formation of these rolls.

Note: Apparently youtube doesn’t let you upload copyrighted music…ignore the bit at the end.

Duration : 0:4:43

Technorati Tags: Complex Fluids, Complexity, fluid dynamics, Fluids, Non-Newtonian, Patten Formation, shampoo, Shear-Thinning

Thinning Shears for Hairstylists » Complex Fluids

Hole Stability in Shampoo Vibrated on a Plate

Roll Formation in Shampoo Vibrated on a Plate