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A flapping filament in a quasi-two-dimensional
soap film flow tunnel: The resulting motion is similar to a
flapping flag. We study the dynamics of a single filament as well
as multiple interacting filaments under the action of an incoming
laminar flow. Two stable states are observed in this system. For
more details click on the picture. - Related press reports |
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Solid-on-solid friction is studied in a
friction driven oscillator. We observe a stochastic process where
sticking (rolling) alternates with slipping. For more details click
on the picture. |
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We are studying a technique for visualizing
thermal convection. Traditional shadowgraphs collapse the three
dimensional information in a convection cell onto a two dimensional
plane. We use the principles of stereo vision to recover the 3D
structure using two sets of shadowgraphs taken from slightly
different angles. For more details click on the picture. |
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A valveless pump is constructed after the
suggestion of Dr. Peskin and Dr. Jung. It is a impedance induced
flow system in a closed circle. A directional flow can be realized
when a periodic forcing is applied. The direction of flow depends
upon the frequency and amplitude. The detailed mechanism is still a
mystery. For more details click on the picture. - Related press reports |
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This work is inspired by the well-studied
problem of modeling continental drift. It is believed that
the Atlantic Ocean closed and then re-opened several times in the
past 2.5 billion years. We found, in a table-top experiment, that a
free floating plate (model continent) can be driven by thermal
turbulence to execute a periodic motion! For more details click on
the picture. |
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