Stick-Slip Motion of Moving Contact Line on Chemically Patterned Surfaces

Handle URI:
http://hdl.handle.net/10754/600263
Title:
Stick-Slip Motion of Moving Contact Line on Chemically Patterned Surfaces
Authors:
Wu, Congmin; Lei, Siulong; Qian, Tiezheng; Wang, Xiaoping
Abstract:
Based on our continuum hydrodynamic model for immiscible two-phase flows at solid surfaces, the stick-slip motion has been predicted for moving contact line at chemically patterned surfaces [Wang et al., J. Fluid Mech., 605 (2008), pp. 59-78]. In this paper we show that the continuum predictions can be quantitatively verified by molecular dynamics (MD) simulations. Our MD simulations are carried out for two immiscible Lennard-Jones fluids confined by two planar solid walls in Poiseuille flow geometry. In particular, one solid surface is chemically patterned with alternating stripes. For comparison, the continuum model is numerically solved using material parameters directly measured in MD simulations. From oscillatory fluid-fluid interface to intermittent stick-slip motion of moving contact line, we have quantitative agreement between the continuum and MD results. This agreement is attributed to the accurate description down to molecular scale by the generalized Navier boundary condition in our continuum model. Numerical results are also presented for the relaxational dynamics of fluid-fluid interface, in agreement with a theoretical analysis based on the Onsager principle of minimum energy dissipation. © 2010 Global-Science Press.
Citation:
Wu C, Lei S, Qian T, Wang X (2009) Stick-Slip Motion of Moving Contact Line on Chemically Patterned Surfaces. CiCP. Available: http://dx.doi.org/10.4208/cicp.2009.09.042.
Publisher:
Global Science Press
Journal:
Communications in Computational Physics
KAUST Grant Number:
SA-C0040; UKC0016
Issue Date:
2009
DOI:
10.4208/cicp.2009.09.042
Type:
Article
ISSN:
1815-2406
Sponsors:
This publication is based on work partially supported by Award No. SA-C0040/UKC0016, made by King Abdullah University of Science and Technology (KAUST), Hong Kong RGC grant CA05/06.SC01, and the Croucher Foundation Grant Z0138. T. Qian was also supported by Hong Kong RGC grant No. 602007.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorWu, Congminen
dc.contributor.authorLei, Siulongen
dc.contributor.authorQian, Tiezhengen
dc.contributor.authorWang, Xiaopingen
dc.date.accessioned2016-02-28T08:00:16Zen
dc.date.available2016-02-28T08:00:16Zen
dc.date.issued2009en
dc.identifier.citationWu C, Lei S, Qian T, Wang X (2009) Stick-Slip Motion of Moving Contact Line on Chemically Patterned Surfaces. CiCP. Available: http://dx.doi.org/10.4208/cicp.2009.09.042.en
dc.identifier.issn1815-2406en
dc.identifier.doi10.4208/cicp.2009.09.042en
dc.identifier.urihttp://hdl.handle.net/10754/600263en
dc.description.abstractBased on our continuum hydrodynamic model for immiscible two-phase flows at solid surfaces, the stick-slip motion has been predicted for moving contact line at chemically patterned surfaces [Wang et al., J. Fluid Mech., 605 (2008), pp. 59-78]. In this paper we show that the continuum predictions can be quantitatively verified by molecular dynamics (MD) simulations. Our MD simulations are carried out for two immiscible Lennard-Jones fluids confined by two planar solid walls in Poiseuille flow geometry. In particular, one solid surface is chemically patterned with alternating stripes. For comparison, the continuum model is numerically solved using material parameters directly measured in MD simulations. From oscillatory fluid-fluid interface to intermittent stick-slip motion of moving contact line, we have quantitative agreement between the continuum and MD results. This agreement is attributed to the accurate description down to molecular scale by the generalized Navier boundary condition in our continuum model. Numerical results are also presented for the relaxational dynamics of fluid-fluid interface, in agreement with a theoretical analysis based on the Onsager principle of minimum energy dissipation. © 2010 Global-Science Press.en
dc.description.sponsorshipThis publication is based on work partially supported by Award No. SA-C0040/UKC0016, made by King Abdullah University of Science and Technology (KAUST), Hong Kong RGC grant CA05/06.SC01, and the Croucher Foundation Grant Z0138. T. Qian was also supported by Hong Kong RGC grant No. 602007.en
dc.publisherGlobal Science Pressen
dc.subjectMoving contact lineen
dc.subjectPatterned surfaceen
dc.subjectSlip boundary conditionen
dc.titleStick-Slip Motion of Moving Contact Line on Chemically Patterned Surfacesen
dc.typeArticleen
dc.identifier.journalCommunications in Computational Physicsen
dc.contributor.institutionDepartment of Mathematics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kongen
kaust.authorQian, Tiezhengen
kaust.authorWang, Xiaopingen
kaust.grant.numberSA-C0040en
kaust.grant.numberUKC0016en
kaust.grant.fundedcenterKAUST-HKUST Micro/Nanofluidic Joint Laboratoryen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.