Nanoscale Saffman-Taylor instabilities

Photo 1: Pola Goldberg-Oppenheimer, University of Cambridge, Dept. of Engineering (source)

Another great photo here, but it’s a bit too wide to publish: Pola Goldberg-Oppenheimer, University of Cambridge, Dept. of Engineering (source, with more info on research)

“Fingering instabilities in viscoelastic liquids”

Source: José Bico, with with Ryan Welsh & Gareth McKinley
http://web.mit.edu/nnf/people/jbico/Research.html

Oh my glob there’s a movie — this needs to be made into a gif

Interests include: “Experiments involving Interfacial Hydrodynamics, Wetting and Non-wetting, Complex fluids and general “Soft Matter”.” 

Recent experiments include: “Spreading flowers” “Gobbling droplets” “Dripping of a jelly liquid” “Fingering instabilities in viscoelastic liquids” “Wrinkling of elastic membranes” “Liquid trains in a tube”

Can’t tell if that’s from a faculty page… or OKC profile

“The world’s largest viscous fingering simulation”

’nuff said

Source: Moore’s Law and the Saffman-Taylor Instability
Petri Fast and Michael J. Shelley
in Journal of Computational Physics 212, 1-5 (2005)

math.nyu.edu/faculty/shelley/Fluids/Publications_2005-2009.html

fuckyeahfluiddynamics:

Place a viscous fluid in the gap between two plates of glass and you have created a Hele Shaw cell. If a less viscous fluid is then injected between the plates, a fascinating pattern of finger-like protrusions results. This is known as the Saffman-Taylor instability. Because of the relative simplicity of the set-up, it’s possible to create such experiments at home using common household fluids like glycerin, dish soap, dyed water, or laundry detergent. (Photo credits: Jessica Rosencranz, Jessica Todd, Laurel Swift et al, Andrea Fabri et al, Tanner Ladtkow et al, Mike Demmons et al, Trisha Harrison, Justin Cohee, and Erik Hansen)

Viscous fingering: Saffman-Taylor instability in a Hele-Shaw cell

Image 1: Jessica Todd. Source

Image 2Dustin Grace, Jessica Todd, Marilyn Poon, Robert Neilson. Source: efluids image gallery

Caption: “Saffman-Taylor instability in a Hele-Shaw cell. When viscous fluid is displaced by a less viscous fluid in a thin layer, a fingering instability forms.

Contributors: Dustin Grace, Jessica Todd, Marilyn Poon and Robert Neilson, University of Colorado, Boulder.

Image created as part of Jean Hertzberg’s Flow Visualization: A Course in the Physics and Art of Fluid Flow.”

More info: http://en.wikipedia.org/wiki/Viscous_fingering