Please use this identifier to cite or link to this item: https://doi.org/10.1002/fld.1885
Title: Mobility-dependent bifurcations in capillarity-driven two-phase fluid systems by using a lattice Boltzmann phase-field model
Authors: Huang, J.J. 
Shu, C. 
Chew, Y.T. 
Keywords: Bifurcation
Contact line
Droplet
Lattice Boltzmann method
Mobility
Issue Date: 10-May-2009
Source: Huang, J.J., Shu, C., Chew, Y.T. (2009-05-10). Mobility-dependent bifurcations in capillarity-driven two-phase fluid systems by using a lattice Boltzmann phase-field model. International Journal for Numerical Methods in Fluids 60 (2) : 203-225. ScholarBank@NUS Repository. https://doi.org/10.1002/fld.1885
Abstract: Bifurcations in capillarity-driven two-phase fluid systems, due to different mobilities in phase-field models for such systems, are studied by using a lattice Boltzmann method (LBM). Specifically, two-dimensional (2D) and three-dimensional (3D) droplets on a flat wall with given wettability variations are investigated. It is found that the mobility controls the rate of diffusive relaxation of the phase field from non-equilibrium toward equilibrium, and similar to previous findings on mechanically driven two-phase systems, the mobility is closely related to the contact line velocity. For the cases investigated, different mobilities across a critical value result in fundamentally different system evolution routes and final stable equilibrium states. These results may provide some implications for phase-field study of droplet manipulations by surface wettability adjustments in microfluidics. Copyright © 2008 John Wiley & Sons, Ltd.
Source Title: International Journal for Numerical Methods in Fluids
URI: http://scholarbank.nus.edu.sg/handle/10635/51457
ISSN: 02712091
DOI: 10.1002/fld.1885
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