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Proceedings Paper

Lateral migration of particles in the Newtonian fluid
Author(s): M. Makino
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Paper Abstract

Studying of lateral migration of particles has a long history in fluid mechanics. In the Stokes approximation, noncharged rigid spherical particle in dilute solution does not migrate to a direction perpendicular to external field. For example, the spherical particle is placed in the vicinity of the wall. The particle doesn’t move when a flow field, which is parallel to the wall, is applied. However, the lateral migrations are observed in dispersions of non-spherical and deformable particles. Blood is a multi-phase dispersion and is composed of red blood cells, leukocytes, platelets and so on dispersed in plasma. The leukocytes and the platelets move to the vicinity of the wall when the blood flows in tube. It is called ‘margination’. In this study, the migrations of binary droplet dispersion with different radii and surface tension coefficient are examined by computer simulations. The interaction among droplets causes a segregation of some kind of particles. The binary droplets dispersion system under Couette flow is simulated and the mean positions of the droplets are evaluated. The margination of small droplets is observed when the surface tension coefficient of the large droplets is small. On the other hand, the margination of large droplets is not observed when the large droplet is stiff.

Paper Details

Date Published: 16 April 2014
PDF: 7 pages
Proc. SPIE 9060, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2014, 90601F (16 April 2014); doi: 10.1117/12.2044837
Show Author Affiliations
M. Makino, Yamagata Univ. (Japan)

Published in SPIE Proceedings Vol. 9060:
Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2014
Vijay K. Varadan, Editor(s)

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