The full spherical geometry, as opposed to tangent plane approximations, is particularly important when considering global streamline patterns generated by a given vorticity distribution...These patterns, in turn, provide the dynamical templates by which one can begin to understand the chaotic advection
of particles in a vortex-dominated flow."
A different but complementary mechanism is that of laminar, chaotic advection
(Aref 1984, Ottino 1989) in which chaotic particle paths can be used to enhance heat transfer (Acharya et al.
A new process for processing plastic composites filled with nanoparticles is based on chaotic advection
. Zumbrunnen has used this process, smart blending, to produce a food-packaging material with reduced gas permeability and to produce conductive materials.
A sampling of topics includes: the Delay logistic model, three- dimensional and higher-dimensional models, non-chaotic systems, rotations, shape and form, chaotic advection
, and chaos in galaxies and related simulations.
Also look out for interesting papers on improving the performance of PLA and PLA foams in Sessions M2, M7, and T28; extruding thermoplastic starches in M22 and T28; and "chaotic advection
" polymer alloying in T4 and T26.
Underlying concepts were first articulated by Aref (8) who denoted this fluid motion by the precise term, chaotic advection
. Chaotic advection
has become an important sub-field of fluid mechanics (9).
The first two commercial devices have been installed to melt blend two or more polymers using a structured fluid-dynamic mixing process known as "chaotic advection
." This process creates unusual micro-scale and nano-scale phase morphologies that potentially can optimize extruded film properties using fewer materials and extruders than with highly layered coextrusion.
In addition, Clemson University's new melt-folding technology, called "chaotic advection
," can create a repeatable stack of up to 1000 semi-continuous microlayers (see "Learn More" box) in a feedblock-like device called a SmartBlender.
of Mechanical Engineering at Clemson University in Clemson, S.C., with National Science Foundation support, the SmartBlender uses a principle of fluid dynamics known as chaotic advection
to fold a masterbatch or other component into a matrix polymer.
" is a new way of combining two or more polymer melts to create a many-layered swirl (like a marble cake) rather than a uniform mixture.