Hernan A. Makse,
Professor Morton Denn. Director, Benjamin Levich Institute,
Departments of Chemical Engineering and Physics.
Research interests: rheology; nonlinear fluids, including liquid
crystals, polymers and polymer blends, and yield-stress materials;
polymer interfaces; flow instabilities.
Professor Joel Koplik. Research interests:
- Molecular fluid mechanics - use atomistic simulations
to analyze small-scale structure of fluid flows in
situations where the continuum description is inadequate,
Current problems: surfactant assisted spreading
dynamics, polymeric extrusion flows, nano-flows on
patterned substrates, particle adhesion.
- Transport in porous media - study fluid, passive tracer
and particulate flow in random geometries representing
aquifers and hydrocarbon reservoirs. Current work
emphasizes flow in fractures and fracture networks, and in
particular the effects of the self-affine roughness of
natural fractured rock surfaces.
- Superfluid vortex dynamics
Current students - Yiguang Yan (ME), Jon Halvorsen (ChE)
Current postdocs - Tak Shing Lo, German Drazer (shared
Professor Hernan A. Makse.
Our research group is devoted to the exploration of a variety of out of
equilibrium systems in terms of their behavior as they experience
structural arrest or jamming. We aim to understand a class of
soft-matter systems spanning from granular materials, colloidal
suspensions, dense emulsions to glasses in search of a unifying
theoretical framework through a statistical mechanics formulation of
jammed matter. The group has a strong focus on the theoretical and
computational approaches in parallel with laboratory experiments,
creating a most productive research environment. The numerical
simulations in parallel architectures guide the diverse experiments
which employ a variety of techniques including granular rheology under
slow shear and confocal microscopy in conjunction with magneto-manipulation as
well as oscillatory shear for the exploration of the colloidal and
the emulsion systems.
Current students - Chaoming Song and Ping Wang
Current postdocs - Yevgeny Yurkovetsky and Nicolas Gland
Professor Mark Shattuck.
Granular Media: Mesoscopic Physics on a Laboratory Scale
Granular materials, complex nonlinear pattern formation, and control
of complex patterns are at the forefront of our understanding of
collective behavior. The study of granular materials
provides insight into poorly understood and vitally important
industrial problems, and an unprecedented opportunity to investigate
experimentally the theoretical underpinnings of statistical physics.
In granular systems, collective behavior and pattern formation can
occur with a small number of macroscopic particles. This property
creates a unique opportunity to gain a fundamental understanding of
mesoscopic systems, such as colloids, lubrication, and nanoscale
porous media. Pattern formation in granular systems illustrates the
profound link between granular flows and ordinary
fluids and is a cornerstone of our research.
Patterns: Competition and Control
The study of pattern formation has produced an understanding of simple
bifurcations to single-patterned states in spatially extended
systems. Patterns in nature, however, display a
complexity which defies this basic understanding. We will push the
study of pattern formation to a new level of complexity using novel
experimental techniques to study systems which combine large numbers
of spatial modes with pattern competition and spatiotemporal
inhomogeneous forcing. Further, we will use spatiotemporal
perturbations to control patterns and stabilize them beyond their
normal range of stability. This is a prerequisite step for control of
complex pattern formation in industrial processes, and control of
natural systems such as weather, evolution, and thought.
Current undergraduate students:
Roberto Martin (CE),
John Okogun (ME)
Current graduate students:
Rohit Ingale (ChE)
Pedro Reis (Phy)
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