Wetting/dewetting transition of two-phase flows in nano-corrugated channels

L. Biferale*, R. Benzi, M. Sbragaglia, S. Succi, F. Toschi

*Corresponding author for this work

Research output: Contribution to journalConference articleAcademicpeer-review

4 Citations (Scopus)

Abstract

A lattice version of the Boltzmann kinetic equation for describing multi-phase flows in nano- and micro-corrugated devices is reviewed. To this purpose, the Shan-Chen Lattice Boltzmann model [Phys. Rev. E 47, 1815 (1993)] for non-ideal fluids is extended to the case of confined geometries with hydrophobic properties on the wall. This extended Shan-Chen method is applied for the simulation of the wetting/dewetting transition in the presence of nanoscopic grooves etched on the boundaries. This approach permits to retain the essential supra-molecular details of fluid-solid interactions without surrendering -in fact boosting- the computational efficiency of continuum methods. The method is first validated against the Molecular Dynamics (MD) results of Cottin-Bizonne et al. [Nature Mater. 2, 237 (2003)] and then applied to more complex geometries, hardly accessible to MD simulations. The resulting analysis confirms that surface roughness and capillary effects can promote a sizeable reduction of the flow drag, with a substantial enhancement of the mass flow rates and slip-lengths, which can reach up to the micrometric range for highly hydrophobic surfaces.
Original languageEnglish
Pages (from-to)447-456
JournalJournal of Computer-Aided Materials Design
Volume14
Issue number3
DOIs
Publication statusPublished - 31 May 2007
Event1st International Conference on Synergy Between Experiment and Computation in Nanoscale Science 2006 - Harvard University, Cambridge, United States
Duration: 31 May 20063 Jun 2006
Conference number: 1

Fingerprint

Two phase flow
Wetting
Molecular dynamics
Fluids
Geometry
Multiphase flow
Computational efficiency
Drag
Surface roughness
Flow rate
Kinetics
Computer simulation

Keywords

  • Microfluidics
  • Lattice Boltzmann equation
  • Non ideal fluids

Cite this

Biferale, L. ; Benzi, R. ; Sbragaglia, M. ; Succi, S. ; Toschi, F. / Wetting/dewetting transition of two-phase flows in nano-corrugated channels. In: Journal of Computer-Aided Materials Design. 2007 ; Vol. 14, No. 3. pp. 447-456.
@article{157bee518f034cb186ccf932a39775f9,
title = "Wetting/dewetting transition of two-phase flows in nano-corrugated channels",
abstract = "A lattice version of the Boltzmann kinetic equation for describing multi-phase flows in nano- and micro-corrugated devices is reviewed. To this purpose, the Shan-Chen Lattice Boltzmann model [Phys. Rev. E 47, 1815 (1993)] for non-ideal fluids is extended to the case of confined geometries with hydrophobic properties on the wall. This extended Shan-Chen method is applied for the simulation of the wetting/dewetting transition in the presence of nanoscopic grooves etched on the boundaries. This approach permits to retain the essential supra-molecular details of fluid-solid interactions without surrendering -in fact boosting- the computational efficiency of continuum methods. The method is first validated against the Molecular Dynamics (MD) results of Cottin-Bizonne et al. [Nature Mater. 2, 237 (2003)] and then applied to more complex geometries, hardly accessible to MD simulations. The resulting analysis confirms that surface roughness and capillary effects can promote a sizeable reduction of the flow drag, with a substantial enhancement of the mass flow rates and slip-lengths, which can reach up to the micrometric range for highly hydrophobic surfaces.",
keywords = "Microfluidics, Lattice Boltzmann equation, Non ideal fluids",
author = "L. Biferale and R. Benzi and M. Sbragaglia and S. Succi and F. Toschi",
note = "This article is to be regarded part of the first Synergy Between Experiment and Computation in Nanoscale Science (NNIN/C) conference held in Cambridge, Massachusetts, U.S.A., 31 May–3 June 2006",
year = "2007",
month = "5",
day = "31",
doi = "10.1007/s10820-007-9061-1",
language = "English",
volume = "14",
pages = "447--456",
journal = "Journal of Computer-Aided Materials Design",
issn = "0928-1045",
publisher = "ESCOM Science Publishers",
number = "3",

}

Wetting/dewetting transition of two-phase flows in nano-corrugated channels. / Biferale, L.; Benzi, R.; Sbragaglia, M.; Succi, S.; Toschi, F.

In: Journal of Computer-Aided Materials Design, Vol. 14, No. 3, 31.05.2007, p. 447-456.

Research output: Contribution to journalConference articleAcademicpeer-review

TY - JOUR

T1 - Wetting/dewetting transition of two-phase flows in nano-corrugated channels

AU - Biferale, L.

AU - Benzi, R.

AU - Sbragaglia, M.

AU - Succi, S.

AU - Toschi, F.

N1 - This article is to be regarded part of the first Synergy Between Experiment and Computation in Nanoscale Science (NNIN/C) conference held in Cambridge, Massachusetts, U.S.A., 31 May–3 June 2006

PY - 2007/5/31

Y1 - 2007/5/31

N2 - A lattice version of the Boltzmann kinetic equation for describing multi-phase flows in nano- and micro-corrugated devices is reviewed. To this purpose, the Shan-Chen Lattice Boltzmann model [Phys. Rev. E 47, 1815 (1993)] for non-ideal fluids is extended to the case of confined geometries with hydrophobic properties on the wall. This extended Shan-Chen method is applied for the simulation of the wetting/dewetting transition in the presence of nanoscopic grooves etched on the boundaries. This approach permits to retain the essential supra-molecular details of fluid-solid interactions without surrendering -in fact boosting- the computational efficiency of continuum methods. The method is first validated against the Molecular Dynamics (MD) results of Cottin-Bizonne et al. [Nature Mater. 2, 237 (2003)] and then applied to more complex geometries, hardly accessible to MD simulations. The resulting analysis confirms that surface roughness and capillary effects can promote a sizeable reduction of the flow drag, with a substantial enhancement of the mass flow rates and slip-lengths, which can reach up to the micrometric range for highly hydrophobic surfaces.

AB - A lattice version of the Boltzmann kinetic equation for describing multi-phase flows in nano- and micro-corrugated devices is reviewed. To this purpose, the Shan-Chen Lattice Boltzmann model [Phys. Rev. E 47, 1815 (1993)] for non-ideal fluids is extended to the case of confined geometries with hydrophobic properties on the wall. This extended Shan-Chen method is applied for the simulation of the wetting/dewetting transition in the presence of nanoscopic grooves etched on the boundaries. This approach permits to retain the essential supra-molecular details of fluid-solid interactions without surrendering -in fact boosting- the computational efficiency of continuum methods. The method is first validated against the Molecular Dynamics (MD) results of Cottin-Bizonne et al. [Nature Mater. 2, 237 (2003)] and then applied to more complex geometries, hardly accessible to MD simulations. The resulting analysis confirms that surface roughness and capillary effects can promote a sizeable reduction of the flow drag, with a substantial enhancement of the mass flow rates and slip-lengths, which can reach up to the micrometric range for highly hydrophobic surfaces.

KW - Microfluidics

KW - Lattice Boltzmann equation

KW - Non ideal fluids

U2 - 10.1007/s10820-007-9061-1

DO - 10.1007/s10820-007-9061-1

M3 - Conference article

VL - 14

SP - 447

EP - 456

JO - Journal of Computer-Aided Materials Design

JF - Journal of Computer-Aided Materials Design

SN - 0928-1045

IS - 3

ER -