Hydrodynamic effects in sedimentation

lameubiquityMechanics

Feb 21, 2014 (3 years and 8 months ago)

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The Materials Computation Center, University of Illinois

Duane Johnson and Richard Martin (PIs), NSF DMR
-
03
-
25939 •


www.mcc.uiuc.edu

Objective:
Understand hydrodynamic effects on colloidal
sedimentation.

Approach:
Implement “stochastic rotation dynamics” for colloidal
suspensions. Here the fluid is treated in a coarse
-
grained manner,
but in sufficient detail to reproduce true hydrodynamics. While much
more efficient than full
-
scale fluid simulation, this is still a time
-
consuming method.

Significant results:

We have now successfully implemented a
parallel version that exhibits unprecedented scalability. The code will
be made freely available to others.

Why it matters
:

Colloidal sedimentation and templating are
important in many industrial areas, such as photonic bandgap
materials and novel data storage media. Conventional simulation
methods do not incorporate important hydrodynamic effects. With
excellent scalability, our method makes it possible to address new
classes of problems.

Principal Investigator:

E. Luijten (UIUC),
Student: Jonathan K. Whitmer


Sedimenting, attractive colloids
(green) in an environment of
500,000 fluid particles (not shown)

Hydrodynamic effects in sedimentation

Funding:

MCC & NSF CAREER Award.