Patterning nanoscale flow vortices in nanochannels with patterned substrates

Siddharth Karakare, Abhimanyu Kar, Avinash Kumar, Suman Chakraborty

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We report the generation of complex toroidal nanoscale vortices in nanochannel flows, through the employment of patterned surface patches with contrasting wettability characteristics. Through extensive molecular-dynamics simulations, we further delineate that complicated interactions between the wettability gradient-driven vortex structures and surface roughness-influenced flow features may give rise to interesting patterns in the flow field. We also establish the orientation specificities of these nanoscale vortices, and demonstrate that the surface roughness effects may potentially act to alter the flow rotationalities realized out of modulated surface patterning effects to a considerable extent, which may have interesting consequences toward designing nanoscale mixing elements.

Original languageEnglish (US)
Article number016324
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume81
Issue number1
DOIs
StatePublished - Jan 29 2010
Externally publishedYes

Fingerprint

Vortex Flow
Patterning
Wettability
Vortex
Substrate
vortices
Surface Roughness
wettability
surface roughness effects
Molecular Dynamics Simulation
Specificity
Flow Field
Patch
flow distribution
surface roughness
roughness
molecular dynamics
Gradient
gradients
Interaction

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

Cite this

Patterning nanoscale flow vortices in nanochannels with patterned substrates. / Karakare, Siddharth; Kar, Abhimanyu; Kumar, Avinash; Chakraborty, Suman.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 81, No. 1, 016324, 29.01.2010.

Research output: Contribution to journalArticle

@article{f37e22db0ade4a09a3e252dca8afef5c,
title = "Patterning nanoscale flow vortices in nanochannels with patterned substrates",
abstract = "We report the generation of complex toroidal nanoscale vortices in nanochannel flows, through the employment of patterned surface patches with contrasting wettability characteristics. Through extensive molecular-dynamics simulations, we further delineate that complicated interactions between the wettability gradient-driven vortex structures and surface roughness-influenced flow features may give rise to interesting patterns in the flow field. We also establish the orientation specificities of these nanoscale vortices, and demonstrate that the surface roughness effects may potentially act to alter the flow rotationalities realized out of modulated surface patterning effects to a considerable extent, which may have interesting consequences toward designing nanoscale mixing elements.",
author = "Siddharth Karakare and Abhimanyu Kar and Avinash Kumar and Suman Chakraborty",
year = "2010",
month = "1",
day = "29",
doi = "10.1103/PhysRevE.81.016324",
language = "English (US)",
volume = "81",
journal = "Physical Review E - Statistical, Nonlinear, and Soft Matter Physics",
issn = "1539-3755",
publisher = "American Physical Society",
number = "1",

}

TY - JOUR

T1 - Patterning nanoscale flow vortices in nanochannels with patterned substrates

AU - Karakare, Siddharth

AU - Kar, Abhimanyu

AU - Kumar, Avinash

AU - Chakraborty, Suman

PY - 2010/1/29

Y1 - 2010/1/29

N2 - We report the generation of complex toroidal nanoscale vortices in nanochannel flows, through the employment of patterned surface patches with contrasting wettability characteristics. Through extensive molecular-dynamics simulations, we further delineate that complicated interactions between the wettability gradient-driven vortex structures and surface roughness-influenced flow features may give rise to interesting patterns in the flow field. We also establish the orientation specificities of these nanoscale vortices, and demonstrate that the surface roughness effects may potentially act to alter the flow rotationalities realized out of modulated surface patterning effects to a considerable extent, which may have interesting consequences toward designing nanoscale mixing elements.

AB - We report the generation of complex toroidal nanoscale vortices in nanochannel flows, through the employment of patterned surface patches with contrasting wettability characteristics. Through extensive molecular-dynamics simulations, we further delineate that complicated interactions between the wettability gradient-driven vortex structures and surface roughness-influenced flow features may give rise to interesting patterns in the flow field. We also establish the orientation specificities of these nanoscale vortices, and demonstrate that the surface roughness effects may potentially act to alter the flow rotationalities realized out of modulated surface patterning effects to a considerable extent, which may have interesting consequences toward designing nanoscale mixing elements.

UR - http://www.scopus.com/inward/record.url?scp=76349084727&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=76349084727&partnerID=8YFLogxK

U2 - 10.1103/PhysRevE.81.016324

DO - 10.1103/PhysRevE.81.016324

M3 - Article

AN - SCOPUS:76349084727

VL - 81

JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

SN - 1539-3755

IS - 1

M1 - 016324

ER -