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     COLLOQUIUM OF THE COMPUTATIONAL MATERIALS SCIENCE CENTER
   AND THE SCHOOL OF PHYSICS, ASTRONOMY AND COMPUTATIONAL SCIENCES
                       (CSI 898-Sec 001)
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   Relationship between structure and dynamics of complex fluids

                        William Krekelberg 
  National Institute of Standards and Technology, Gaithersburg, MD

The intuitive link between the static and dynamic properties of liquids is
often taken for granted. For simple liquids, we expect dynamic properties
such as viscosity or self-diffusion to track static properties such as the
degree of interparticle correlations (structural order). However, the
properties of  complex fluid systems can be drastically different from those
of simple liquids. For example, the  viscosity of suspended colloidal
particles can anomalously decrease upon cooling, and the viscosity of aqueous
solutions can anomalously decrease under compression. Also, the dynamics of a
fluid under confinement can vary non-monotonically with the degree of
confinement. In these complex systems, does a connection between static and
dynamic properties exist?  In this talk, we address this question via
comprehensive simulation results. In particular, we show that the dynamic
properties of complex systems can be mapped to those of simple systems via a
simple order parameter based on excess entropy. Moreover, we show that this
mapping can be exploited to quantitatively predict the transport properties of
complex fluid systems.
 
                      Monday, February 14, 2011
                               4:30 pm
                    Room 301, Research I, Fairfax Campus

Refreshments will be served at 4:15 PM.
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Find the schedule at http://cmasc.gmu.edu/seminar/schedule.html