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Suspension Mixing and Segregation in 1D, 2D, and 3D Flows

[+] Author Affiliations
James F. Gilchrist, Changbao Gao

Lehigh University, Bethlehem, PA

Paper No. ICNMM2007-30160, pp. 1023-1026; 4 pages
  • ASME 2007 5th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 5th International Conference on Nanochannels, Microchannels, and Minichannels
  • Puebla, Mexico, June 18–20, 2007
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4272-X | eISBN: 0-7918-3800-5
  • Copyright © 2007 by ASME


Particles in concentrated flowing suspension in pressure-driven flows tend to migrate away from the walls toward the center of the channel. Demixing due to shear-induced migration inhibits mixing and near wall transport. We investigate the competition between mixing and segregation in flows with complicated geometries that generate 3D chaotic advection, resulting in nontrivial concentration patterns. Using high-speed confocal laser scanning microscopy, we directly image the microspheres to measure the interplay between chaotic advection and the 3D spatial concentration profile, local particle velocities, and suspension structure.

Copyright © 2007 by ASME
Topics: Flow (Dynamics)



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