Measurements of the fluid and particle mobilities in strong electric fields

Document Type

Article

Publication Date

1-1-2006

Abstract

We present a method for measuring both the fluid and particle velocities in strong electric fields and carefully analyze the repeatability and reproducibility of the measurements. The experiments were conducted in 50-μm capillaries containing dilute aqueous suspensions of 4-μm polystyrene spheres subjected to dc as well as ac (5-50 Hz) fields of strengths up to 1 and 0.6 kV/cm, respectively. These measurements indicate that the predictions of classical linear theories for electrokinetic phenomena apply well beyond the range of relatively weak electric fields for which these theories were developed. The results of our studies are critical for the quantification of microanalytical systems which make use of electrokinetic phenomena for the transport, control, and manipulation of fluids and particles. © 2006 American Institute of Physics.

Identifier

33846117008 (Scopus)

Publication Title

Physics of Fluids

External Full Text Location

https://doi.org/10.1063/1.2397573

ISSN

10706631

Issue

12

Volume

18

Grant

CTS-0307099

Fund Ref

National Science Foundation

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