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Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 429899
Title Effects of confinement on hydrodynamic interactions between a suspended sphere and stationary obstacles
Author(s) Sman, R.G.M. van der
Source Computers & Fluids 58 (2012). - ISSN 0045-7930 - p. 63 - 69.
Department(s) Food Process Engineering
FBR Food Technology
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) deterministic lateral displacement - microfluidic devices - flow - separation - simulations - particles - fractionation
Abstract Via Lattice Boltzmann simulations we have derived an empirical relation for the hydrodynamic interaction between a sedimenting sphere and an obstacle in narrow confining flow channels. This relation is of importance for particle tracking in microfluidic devices used for fractionation of suspensions. The hydrodynamic interaction is a function of the dimensionless gap, the degree of confinement, and the ratio of the principal curvatures of the sphere and obstacle. The degree of confinement is defined as the ratio of particle diameter and the length scale, which enters the mobility of the confined sphere, and is described by a generalisation of the Haberman–Sayre correlation. For gaps larger than a certain the screening length, the hydrodynamic interaction changes over from a 1/¿ to a 1/¿2 scaling. The screening length is dependent on the degree of confinement.
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