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VERSION:2.0
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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20261003T100000Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20110308T203000Z
DTEND:20110308T213000Z
UID:event749@bu.edu
URL:http://physics.bu.edu/internal/events/show/749
SUMMARY:Sailing on Diffusion
DESCRIPTION:Featuring Tom Peacock\, MIT\nHosted by: David Campbell\nPoster:
	 http://physics.bu.edu/posters/2011_Spring/04_Peacock.pdf\n\nPart of the Ph
	ysics Department Colloquia Series.\n\nBuoyancy-driven flow\, which is flow 
	driven by spatial variations in fluid density\, lies at the heart of a vari
	ety of physical processes\, including mineral transport in rocks\, the melt
	ing of icebergs and the migration of tectonic plates. Here\, we report on a
	 new discovery that buoyancy-driven flows can also generate propulsion. Spe
	cifically\, we find that when an asymmetric object floats in a density-stra
	tified fluid\, the diffusion-driven flow at its sloping boundaries draws en
	ergy and momentum from microscale molecular diffusion to produce a macrosco
	pic sideways thrust. This remarkable and fundamental discovery has implicat
	ions for transport processes in regions of varying fluid density\, such as 
	the ocean pycnocline\, and wherever there is a temperature difference betwe
	en immersed objects and the surrounding fluid.
LOCATION:SCI 107\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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