SPREADING DYNAMICS OF NANODROPS: A LATTICE BOLTZMANN STUDY

Markus Gross () and Fathollah Varnik ()
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Markus Gross: ICAMS, Ruhr-Universität Bochum, Universitätsstraße 150, 44780 Bochum, Germany
Fathollah Varnik: ICAMS, Ruhr-Universität Bochum, Universitätsstraße 150, 44780 Bochum, Germany

International Journal of Modern Physics C (IJMPC), 2014, vol. 25, issue 01, 1-7

Abstract: Spreading of nano-droplets is an interesting and technologically relevant phenomenon, where thermal fluctuations lead to unexpected deviations from well-known deterministic laws. Here, we apply the newly developed fluctuating nonideal lattice Boltzmann (LB) method [M. Gross, M. E. Cates, F. Varnik and R. Adhikari,J. Stat. Mech.2011, P03030 (2011)] for the study of this issue. Confirming the predictions of Davidovich and coworkers [Phys. Rev. Lett.95, 244905 (2005)], we provide the first independent evidence for the existence of an asymptotic, self-similar noise-driven spreading regime in both two- (2D) and three-dimensional (3D) geometry. The cross over from the deterministic Tanner's law, where the drop's base radiusbgrows (in 3D) with time asb ~ t1/10and the noise dominated regime, whereb ~ t1/6is also observed by tuning the strength of thermal noise.

Keywords: Drops; spreading; noise; lattice-Boltzmann method; 11.25.Hf; 123.1K (search for similar items in EconPapers)
Date: 2014
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DOI: 10.1142/S0129183113400196

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