Capillary Effects during Droplet Formation on the Solid Surface

Article Preview

Abstract:

We investigate the capillary effects during droplet formation on pillar surface via a dewetting process. The microdroplet formed from the fluid remains on the top surface of micropillar after the dewetting process. The simulation results show that the ratio of the diameter of microdroplet (Dd) and the diameter of micropillar (Dp) is correlated as 3.26Re0.25 for H/Dp<0.5, where Re is the Reynolds numbers and H is the liquid thickness between the top surface of micropillar and the upper substrate. The analytical solution for growth droplet based on the conservation of energy is provided. The numerical results show that our prediction is consistent with the analytical solution for a large range of Re number.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

889-893

Citation:

Online since:

April 2013

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2013 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] L. Wu, M. Tsutahara, L.S. Kim, and M. Ha: Inter. J. Multiphase Flow Vol. 34 (2008), p.852.

Google Scholar

[2] G. Yang and J.A. Liburdy: J. Fluids and Structures Vol. 24 (2008), p.576.

Google Scholar

[3] X. Fang, M. Pimentel, J. Sokolov, and M. Rafailovich: Langmuir Vol. 26 (2010), p.7682.

Google Scholar

[4] C.H. Lin, J. Guan, S.W. Chau, S.C. Chen, and L.J. Lee: Biomicrofluidics Vol. 4 (2010), p.034103.

Google Scholar

[5] M. Perić and J.H. Ferziger: Computational Methods for Fluid Dynamics (Springer, Berlin 1996).

Google Scholar

[6] S.V. Pantankar: Numerical Heat Transfer and Fluid Flow (Hemisphere, New York 1980).

Google Scholar

[7] B.A. Dwiyantoro and S.W. Chau: submitted to J. Mechanical Engineering Science (2012).

Google Scholar

[8] V.P. Carey: Liquid–Vapor Phase Change Phenomena (Taylor & Francis, Bristol 1992).

Google Scholar

[9] M. Pasandideh-Fard, Y.M. Qiao, S. Chandra, and J. Mostaghimi: Phys. Fluids Vol. 8 (1996), p.650.

Google Scholar

[10] F.M. White: Viscous Fluid Flow (McGraw-Hill, New York 1991).

Google Scholar