Chaotic mixing enhancement in electro-osmotic flows by random period modulation

J. Rafael Pacheco, Kangping Chen, Arturo Pacheco-Vega, Baisong Chen, Mark Hayes

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In this Letter we report a method for enhancing mixing of a passive tracer in an electro-osmotic flow in a rectangular microchannel. A time-periodic electric field across the microchannel, filled with an electrolyte solution, is applied in order to realize a well-mixed state. A random perturbation to the time-periodic electric field is introduced in order to break the invariant tori of the system and achieve better mixing results. It is shown that under such period-modulation the enhancement effect increases with the strength of the modulation, and it is much reduced as diffusion is increased.

Original languageEnglish (US)
Pages (from-to)1001-1008
Number of pages8
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume372
Issue number7
DOIs
StatePublished - Feb 11 2008

Fingerprint

microchannels
modulation
electric fields
augmentation
tracers
electrolytes
perturbation

Keywords

  • Chaotic mixing
  • Electro-osmotic flow
  • Low Reynolds number
  • Random period modulation
  • Stochasticity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Chaotic mixing enhancement in electro-osmotic flows by random period modulation. / Pacheco, J. Rafael; Chen, Kangping; Pacheco-Vega, Arturo; Chen, Baisong; Hayes, Mark.

In: Physics Letters, Section A: General, Atomic and Solid State Physics, Vol. 372, No. 7, 11.02.2008, p. 1001-1008.

Research output: Contribution to journalArticle

@article{23a3ce58fbdb4221be78f99bc98dbfc3,
title = "Chaotic mixing enhancement in electro-osmotic flows by random period modulation",
abstract = "In this Letter we report a method for enhancing mixing of a passive tracer in an electro-osmotic flow in a rectangular microchannel. A time-periodic electric field across the microchannel, filled with an electrolyte solution, is applied in order to realize a well-mixed state. A random perturbation to the time-periodic electric field is introduced in order to break the invariant tori of the system and achieve better mixing results. It is shown that under such period-modulation the enhancement effect increases with the strength of the modulation, and it is much reduced as diffusion is increased.",
keywords = "Chaotic mixing, Electro-osmotic flow, Low Reynolds number, Random period modulation, Stochasticity",
author = "Pacheco, {J. Rafael} and Kangping Chen and Arturo Pacheco-Vega and Baisong Chen and Mark Hayes",
year = "2008",
month = "2",
day = "11",
doi = "10.1016/j.physleta.2007.08.051",
language = "English (US)",
volume = "372",
pages = "1001--1008",
journal = "Physics Letters, Section A: General, Atomic and Solid State Physics",
issn = "0375-9601",
publisher = "Elsevier",
number = "7",

}

TY - JOUR

T1 - Chaotic mixing enhancement in electro-osmotic flows by random period modulation

AU - Pacheco, J. Rafael

AU - Chen, Kangping

AU - Pacheco-Vega, Arturo

AU - Chen, Baisong

AU - Hayes, Mark

PY - 2008/2/11

Y1 - 2008/2/11

N2 - In this Letter we report a method for enhancing mixing of a passive tracer in an electro-osmotic flow in a rectangular microchannel. A time-periodic electric field across the microchannel, filled with an electrolyte solution, is applied in order to realize a well-mixed state. A random perturbation to the time-periodic electric field is introduced in order to break the invariant tori of the system and achieve better mixing results. It is shown that under such period-modulation the enhancement effect increases with the strength of the modulation, and it is much reduced as diffusion is increased.

AB - In this Letter we report a method for enhancing mixing of a passive tracer in an electro-osmotic flow in a rectangular microchannel. A time-periodic electric field across the microchannel, filled with an electrolyte solution, is applied in order to realize a well-mixed state. A random perturbation to the time-periodic electric field is introduced in order to break the invariant tori of the system and achieve better mixing results. It is shown that under such period-modulation the enhancement effect increases with the strength of the modulation, and it is much reduced as diffusion is increased.

KW - Chaotic mixing

KW - Electro-osmotic flow

KW - Low Reynolds number

KW - Random period modulation

KW - Stochasticity

UR - http://www.scopus.com/inward/record.url?scp=38649098173&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38649098173&partnerID=8YFLogxK

U2 - 10.1016/j.physleta.2007.08.051

DO - 10.1016/j.physleta.2007.08.051

M3 - Article

AN - SCOPUS:38649098173

VL - 372

SP - 1001

EP - 1008

JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

SN - 0375-9601

IS - 7

ER -