Ameoba

Amoeba, pen and ink.

Antony Hall, Amoeba, pen and ink.

Starting on a set of drawings to show in 2015. The style of this one emulates the detailed illustrations by MILDRED BUCHSBAUM, in Animals Without Backbones a classic among biology textbooks since it was first published to great acclaim in 1938. A book that has bee a great inspiration to my work over the years.

levitating explosive reaction

Here is a selection of experiments with droplets of water some of which are performed either levitating or in zero gravity. Above; a nugget of sodium and a globule of water are made to levitate and then collide using acoustic levitation, reacting violently. And below a selection from the international space station where you can experiment with ” a free floating sphere of water about the size of your head”

http://www.sciencenews.org/view/generic/id/351634/description/Sound_waves_put_levitation_on_the_move


Rotating Sphere of Water in Microgravity


Marangoni Convection in Microgravity

flag-shaped filaments undulate in soap film

Tiny flag-shaped filaments undulate in a fluid, leaving the wakes seen in the outer panels. The two center panels reveal the flags’ motion through long exposure photography. Image Credit: L. Ristroph and J. Zhang/PRL

Soap films are great for creating 2 dimensional flowing planes, in which things can be placed to observe or visualize effects of drag and turbulence, without using complex apparatus such as a wind tunnel or lasers; The reflected light does all the work, Speed and movement in the film reflect different wavelengths of light due to the way the film thins as it moves faster, or pools.  In this experiment the researchers placed tiny filaments, which behaved in a similar way to  flag moving in the wind.

http://physicscentral.com/explore/pictures/fluid-flags.cfm

Research paper here…
http://prl.aps.org/abstract/PRL/v101/i19/e194502 

Droplet formation experiment

Investigation of Local Absorption rates in Falling-Film Absorption My research brought me to this page on the Investigation of Local Absorption rates in Falling-Film Absorption http://stsl.gatech.edu/research-falling.html. I was struck by this image illustrating droplet formation in a series. What is exciting is the elaborate apparatus for the experiment also shown. Generally the droplet grows while attached to the underside of something,, as it grows it becoming increasingly laden with fluid, its shape begins to elongate before eventually breaking away.

What happens when you place a CD in the microwave?

IMG_0960

Antony Hall, Microwave CD, 2012

Antony Hall, Microwave CD, 2012

Antony Hall, Microwave CD, 2012

Antony Hall, Microwave CD, 2012

This what happens when you place a CD in the microwave for around 1-3 seconds. No more or else it might catch on fire. There is a light show of sparks and the smell of burning plasma. Its also interesting to try a DVD. The patterns occur due to the thin aluminium layer vaporizing between the plastic, plenty of information out there, including this comprehensive study with a few more ideas to experiment with…

Temporal and Spatial Aspects of Microwave Excitation of Compact Disks
http://raptor.physics.wisc.edu/wacky/cd/