期刊
PHYSICS OF FLUIDS
卷 27, 期 3, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4915891
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资金
- Sponsored Research Industrial Consultancy (SRIC), Indian Institute of Technology Kharagpur under Project Center of Excellence for Research and Training in Microfluidics (CEM)
We consider electrically driven dynamics of an incompressible binary fluid, with contrasting densities and viscosities of the two phases, flowing through narrow fluidic channel with walls with predefined surface wettabilities. Through phase field formalism, we describe the interfacial kinetics in the presence of electrohydrodynamic coupling and address the contact line dynamics of the two-fluid system. We unveil the interplay of the substrate wettability and the contrast in the fluid properties culminating in the forms of two distinct regimes-interface breakup regime and a stable interface regime. Through a parametric study, we demarcate the effect of the density and viscosity contrasts along with the electrokinetic parameters such as the surface charge and ionic concentration on the underlying contact-line-dynamics over interfacial scales. (C) 2015 AIP Publishing LLC.
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