Fascinating fluid mechanics
“A vortex can be seen in the spiraling motion of air or liquid around a center of rotation. Circular current of water of conflicting tides form vortex shapes. Turbulent flow makes many vortices. A good example of a vortex is the atmospheric phenomenon of a whirlwind or a tornado or dust devil. This whirling air mass mostly takes the form of a helix, column, or spiral. Tornadoes develop from severe thunderstorms, usually spawned from squall lines and supercell thunderstorms, though they sometimes happen as a result of a hurricane.”
Absolutely amazing photos on Flickr:
AYVAZOVSKY Ivan | The Wave. | c.1889 | Russian | Romantic |
Oil on Canvas |
©Kathleen Cohen |
Your current search criteria is: Sea and Waterscapes
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.
Dense, falling droplets of food coloring form vortex rings due to the Rayliegh-Taylor instability.
47 Photo project presents great “fluid” photos:
When coffee meets milk
from Prof. T.T. Lim gallery [link]
notice the entrainment 🙂
from the online version of the Van Dyke’s Album of Fluid Motion [my post has a link]
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.
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)
From the Gallery of fluid motion on www.EFluids.com – tip vortex behind an airplane:
Beatiful photos of smoke by Graham Jeffery: Coloured smoke
Airsmoke group on Flickr.com
One more from Flickr (press on image to see the original one).
Off-axis Vortex Ring Collisions