Alex’s Blog

Fascinating fluid mechanics

Beautiful picture of breaking waves from Imperial College:

from http://www.flickr.com/photos/8720628@N04/595482265/
the photostream of Fractal Artist

From: http://blogist.wordpress.com/2008/02/13/smokin/

rusr7247.jpg |
AYVAZOVSKY Ivan | The Wave. | c.1889 | Russian | Romantic |
Oil on Canvas |
Russia. |
|
©Kathleen Cohen |

Your current search criteria is: Sea and Waterscapes
http://worldimages.sjsu.edu/VieO56817$30486*3630105

Nigel Gorbold, Lok Kin Lee, Christopher McCray, Taylor Simonson, Melissa Talmage

A jet in crossflow
exhibits a shear instability. Visualized with dye in a flume.

More info

.

Lindsey Wohlman

Dense, falling droplets of food coloring form vortex rings due to the Rayliegh-Taylor instability.

47 Photo project presents great “fluid” photos:

From Album of Flow Visualization, THTLab, the Uni. of Tokyo

GIF, 13MB

When coffee meets milk

from Prof. T.T. Lim gallery [link]

notice the entrainment

from LiveScience

from the online version of the Van Dyke’s Album of Fluid Motion [my post has a link]

from http://www.eng.vt.edu/fluids/msc/gallery/gall.htm

http://www.eng.vt.edu/fluids/msc/gallery/gall.htm

Cerebrospinal fluid, visualized in a laser light by fluorescent particles. Image is taken in IfU lab.

Jet in the cross-flow or simply the fountain on the lake of Geneve:

The physics of a tennis ball, watch the movies and see the wakes of spinning balls as compared to the non-spinning ones.

In addition to this post, the Art of Science competition also includes the beatiful visualization of:

Wake of a Pitching Plate
James Buchholz GS and Alexander Smits
Department of Mechanical and Aerospace Engineering

These images contain top and side views of the wake produced by a rigid plate pitching about its leading edge in a uniform flow (flowing left to right). The leading edge of the plate is hinged to the trailing edge of a stationary symmetric airfoil. The wake is visualized using fluorescent dyes that are introduced through a series of holes on each side of the airfoil support. Twice in each flapping cycle, a horseshoe-shaped vortex is shed from the top, bottom, and trailing edges. The vortices become entangled to form the chain-like structure shown here. Studying such wakes is believed to be important for understanding the mechanisms of thrust production in fish-like swimming.

Vortex streets, NASA

Tornado pictures:
an example from http://www.weatherstock.com/tornadocat3.html#TTT00

Filtered Luminosity photograph of bow shock detached to a Mars Pathfinder aero shell model, scaled down 1:25.6 and measured in X3 Expansion tube of the Centre for Hypersonics in the the University of Queensland. The flow properties : Mach 10, 8.1 km/s and the photo is made by one of our recent PyPIV/URAPIV users: Dwishen Ramanah (you can ask me for his contact e-mail).

Sand storm in Iraq (the source is here)

The “steam rings” are about 200m across from Etna (2000) see the original link on BBC
or look at the beautiful Stromboli online

From the Gallery of fluid motion on www.EFluids.com - tip vortex behind an airplane:

Beatiful photos of smoke by Graham Jeffery: Coloured smoke
one example:

Airsmoke group on Flickr.com

http://www.flickr.com/groups/artsmoke/

One more from Flickr (press on image to see the original one).