Droplet motion driven by surface freezing or melting: a mesoscopic hydrodynamic approach.
نویسندگان
چکیده
A fluid droplet may exhibit self-propelled motion by modifying the wetting properties of the substrate. We propose a model for droplet propagation upon a terraced landscape of ordered layers formed as a result of surface freezing driven by the contact angle dependence on the terrace thickness. Simultaneous melting or freezing of the terrace edge results in a joint droplet-terrace motion. The model is tested numerically and compared to experimental observations on long-chain alkane systems in the vicinity of the surface melting point.
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ورودعنوان ژورنال:
- Physical review. E, Statistical, nonlinear, and soft matter physics
دوره 72 2 Pt 2 شماره
صفحات -
تاریخ انتشار 2005