Hydrodynamic dispersion in narrow microchannels: Shape matters!

Armand Ajdari; Nathalie Bontoux; Howard A. Stone

Hydrodynamic dispersion in narrow microchannels: Shape matters!

Armand Ajdari
, Nathalie Bontoux
, Howard A. Stone

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We highlight the fact that hydrodynamic dispersion in narrow microchannels is essentially controlled by the width of the cross-section rather than by the much thinner height of the channel. Using the lubrication approximation, we provide simple formulas that allow quantitative evaluation of dispersion for any narrow cross-sectional shape, both in the short-time "ballistic regime" and in the long-time regime, which is effectively diffusive. The special cases of parabolic and quasi-rectangular shapes are considered due to their frequent use in microsystems.

Original language	English (US)
Title of host publication	05AIChE
Subtitle of host publication	2005 AIChE Annual Meeting and Fall Showcase, Conference Proceedings
Number of pages	1
State	Published - Dec 1 2005
Event	05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States Duration: Oct 30 2005 → Nov 4 2005

Other

Other	05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
Country/Territory	United States
City	Cincinnati, OH
Period	10/30/05 → 11/4/05

All Science Journal Classification (ASJC) codes

General Engineering

Cite this

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title = "Hydrodynamic dispersion in narrow microchannels: Shape matters!",

abstract = "We highlight the fact that hydrodynamic dispersion in narrow microchannels is essentially controlled by the width of the cross-section rather than by the much thinner height of the channel. Using the lubrication approximation, we provide simple formulas that allow quantitative evaluation of dispersion for any narrow cross-sectional shape, both in the short-time {"}ballistic regime{"} and in the long-time regime, which is effectively diffusive. The special cases of parabolic and quasi-rectangular shapes are considered due to their frequent use in microsystems.",

author = "Armand Ajdari and Nathalie Bontoux and Stone, \{Howard A.\}",

year = "2005",

month = dec,

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note = "05AIChE: 2005 AIChE Annual Meeting and Fall Showcase ; Conference date: 30-10-2005 Through 04-11-2005",

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T1 - Hydrodynamic dispersion in narrow microchannels

T2 - 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase

AU - Ajdari, Armand

AU - Bontoux, Nathalie

AU - Stone, Howard A.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - We highlight the fact that hydrodynamic dispersion in narrow microchannels is essentially controlled by the width of the cross-section rather than by the much thinner height of the channel. Using the lubrication approximation, we provide simple formulas that allow quantitative evaluation of dispersion for any narrow cross-sectional shape, both in the short-time "ballistic regime" and in the long-time regime, which is effectively diffusive. The special cases of parabolic and quasi-rectangular shapes are considered due to their frequent use in microsystems.

AB - We highlight the fact that hydrodynamic dispersion in narrow microchannels is essentially controlled by the width of the cross-section rather than by the much thinner height of the channel. Using the lubrication approximation, we provide simple formulas that allow quantitative evaluation of dispersion for any narrow cross-sectional shape, both in the short-time "ballistic regime" and in the long-time regime, which is effectively diffusive. The special cases of parabolic and quasi-rectangular shapes are considered due to their frequent use in microsystems.

UR - https://www.scopus.com/pages/publications/33645560755

UR - https://www.scopus.com/pages/publications/33645560755#tab=citedBy

M3 - Conference contribution

AN - SCOPUS:33645560755

BT - 05AIChE

Y2 - 30 October 2005 through 4 November 2005

ER -

Hydrodynamic dispersion in narrow microchannels: Shape matters!

Abstract

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All Science Journal Classification (ASJC) codes

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