Campuses:

Mixing

Thursday, April 15, 2010 - 3:00pm - 3:45pm
Richard McLaughlin (University of North Carolina, Chapel Hill)
Keywords: mixing, shear dispersion, Taylor dispersion
Thursday, April 15, 2010 - 4:00pm - 4:45pm
Igor Mezic (University of California)
Keywords: mixing, mix-norm, optimal stirring, ergodicity

Abstract: I will discuss several issues in analyzing kinematics of a purely advective mixing process:

1) Determine whether the scalar quantity, such as dye, introduced into the flow field is - asymptotically - in time thoroughly mixed.

2) Determine how good is the mixture at any finite time.

3) Provide methods for open-loop optimization or feedback control of the mixture.
Wednesday, April 14, 2010 - 9:00am - 9:45am
Emily Shuckburgh (British Antarctic Survey)
Keywords: eddy diffusivity, conserved tracer, reactive tracer
Thursday, April 15, 2010 - 11:30am - 12:15pm
Alexander Kiselev (University of Wisconsin, Madison)
Keywords: passive scalar, enhanced diffusion, mixing
properties

Abstract: We consider passive scalar equation on a compact domain or manifold.
The fluid flow can aid diffusion and increase the speed of convergence of
the initial distribution to its average. We consider either stationary
or time periodic flows, and derive a sharp characterization of flows that
are particularly effective in enhancing the relaxation speed to mean value.
The characterization links enhanced relaxation with spectral properties
Thursday, April 15, 2010 - 10:30am - 11:15am
Jeffrey Weiss (University of Colorado)
Keywords: mixing reaction broadcast
spawning coral scaling

Abstract: Coral and other marine organisms reproduce through the
mechanism of broadcast spawning, where egg and sperm are
released at separate locations and brought together by fluid
mixing and transport. Coral fertilization is particularly
important because corals are threatened by anthropogenic
climate change. We idealize broadcast spawning as point sources
of two reacting tracers separated by a neutral fluid. This
Monday, December 7, 2009 - 2:10pm - 2:50pm
Frieder Mugele (Universiteit Twente)
Keywords: Electrowetting, mixing, electrothermal flow
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