Measurements of the fluid and particle mobilities in strong electric fields

Anil Kumar; Ezinwa Elele; Mike Yeksel; Boris Khusid; Zhiyong Qiu; Andreas Acrivos

doi:10.1063/1.2397573

Measurements of the fluid and particle mobilities in strong electric fields

Anil Kumar, Ezinwa Elele, Mike Yeksel, Boris Khusid, Zhiyong Qiu, Andreas Acrivos

Chemical and Materials Engineering

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

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.

Original language	English (US)
Article number	123301
Journal	Physics of Fluids
Volume	18
Issue number	12
DOIs	https://doi.org/10.1063/1.2397573
State	Published - Dec 2006

All Science Journal Classification (ASJC) codes

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

Keywords

Electrohydro dynamics
Electrokinetic effects
Flow measurement
Microchannel flow
Non-Newtonian flow
Pipe flow
Polymer solutions
Suspensions
Two-phase flow

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10.1063/1.2397573

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title = "Measurements of the fluid and particle mobilities in strong electric fields",

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.",

keywords = "Electrohydro dynamics, Electrokinetic effects, Flow measurement, Microchannel flow, Non-Newtonian flow, Pipe flow, Polymer solutions, Suspensions, Two-phase flow",

author = "Anil Kumar and Ezinwa Elele and Mike Yeksel and Boris Khusid and Zhiyong Qiu and Andreas Acrivos",

note = "Funding Information: We are grateful to German Drazer (Johns Hopkins University) and Fabio Baldessari (Stanford University) for their critical reading and comments on an earlier version of this manuscript, Ilona Kretzschmar (City College of New York) for her help in translating Quincke{\textquoteright}s (1861) article from German to English, and Anubhav Tripathi (Brown University) for his valuable suggestions during the development phase of our experimental protocol. This work was supported in part by grants from NASA (Grant No. NAG3-2698), NSF (Grant No. CTS-0307099), and NSF/Sandia (Grant No. NIRT/NER-0330703) (B.K).",

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doi = "10.1063/1.2397573",

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AU - Kumar, Anil

AU - Elele, Ezinwa

AU - Yeksel, Mike

AU - Khusid, Boris

AU - Qiu, Zhiyong

AU - Acrivos, Andreas

N1 - Funding Information: We are grateful to German Drazer (Johns Hopkins University) and Fabio Baldessari (Stanford University) for their critical reading and comments on an earlier version of this manuscript, Ilona Kretzschmar (City College of New York) for her help in translating Quincke’s (1861) article from German to English, and Anubhav Tripathi (Brown University) for his valuable suggestions during the development phase of our experimental protocol. This work was supported in part by grants from NASA (Grant No. NAG3-2698), NSF (Grant No. CTS-0307099), and NSF/Sandia (Grant No. NIRT/NER-0330703) (B.K).

PY - 2006/12

Y1 - 2006/12

N2 - 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.

AB - 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.

KW - Electrohydro dynamics

KW - Electrokinetic effects

KW - Flow measurement

KW - Microchannel flow

KW - Non-Newtonian flow

KW - Pipe flow

KW - Polymer solutions

KW - Suspensions

KW - Two-phase flow

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M1 - 123301

ER -

Measurements of the fluid and particle mobilities in strong electric fields

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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