LATTICE BOLTZMANN SIMULATIONS OF CONTACT LINE PINNING

Xinli Jia (), J. B. McLaughlin (), G. Ahmadi () and K. Kontomaris ()
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Xinli Jia: Chemical and Biomolecular Engineering, Clarkson University, Potsdam, NY 13699-5705, USA
J. B. McLaughlin: Chemical and Biomolecular Engineering, Clarkson University, Potsdam, NY 13699-5705, USA
G. Ahmadi: Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, NY 13699-5725, USA
K. Kontomaris: DuPont Engineering Research and Technology, DuPont Experimental Station, E249/115, Wilmington, DE 19880-0249, USA

International Journal of Modern Physics C (IJMPC), 2007, vol. 18, issue 04, 595-601

Abstract: Contact angle hysteresis is caused by contact line pinning by geometrical and/or chemical non-uniformities on a solid surface. For small contact angles, theories have been developed for the pinning of contact angles, and an analogy between geometrical and chemical defects has been established. This paper presents LBM results for the interaction of a contact line with a spatially periodic array of chemical defects. The results are for finite contact angles. Qualitative comparisons with existing theories for chemical defects and experimental results for geometrical defects are made for pinned contact lines.

Keywords: Contact line; pinning; surface defects; 11.25.Hf; 123.1K (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0129183107010838

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