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Article Dans Une Revue Journal of Chemical Physics Année : 2010

Transport of free surface liquid films and drops by external ratchets and self-ratcheting mechanisms

Résumé

We discuss the usage of ratchet mechanisms to transport a continuous phase in several micro-fluidic settings. In particular, we study the transport of a dielectric liquid in a heterogeneous ratchet capacitor that is periodically switched on and off. The second system consists of drops on a solid substrate that are transported by different types of harmonic substrate vibrations. We argue that the latter can be seen as a self-ratcheting process and discuss analogies between the employed class of thin film equations and Fokker-Planck equations for transport of discrete objects in a 'particle ratchet'.

Dates et versions

hal-00535936 , version 1 (14-11-2010)

Identifiants

Citer

Uwe Thiele, Karin John. Transport of free surface liquid films and drops by external ratchets and self-ratcheting mechanisms. Journal of Chemical Physics, 2010, 375, pp.578. ⟨10.1016/j.chemphys.2010.07.011⟩. ⟨hal-00535936⟩

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