Transport of free surface liquid films and drops by external ratchets and self-ratcheting mechanisms
arXiv:1001.2417 · doi:10.1016/j.chemphys.2010.07.011
Abstract
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'.
10 pages, 13 figures
References in corpus (4)
- Artificial Brownian motors: Controlling transport on the nanoscale
- Long-wave theory of bounded two-layer films with a free liquid-liquid interface: Short- and long-time evolution
- Self-ratcheting Stokes drops driven by oblique vibrations
- Liquid transport generated by a flashing field-induced wettability ratchet
Cited by in corpus (6)
- Ratcheting of driven attracting colloidal particles: Temporal density oscillations and current multiplicity
- Rugotaxis: Droplet motion without external energy supply
- Unidirectional Droplet Propulsion onto Gradient Brushes without External Energy Supply
- Antidurotaxis Droplet Motion onto Gradient Brush Substrates
- Durotaxis and antidurotaxis droplet motion onto gradient gel-substrates
- Directed droplet motion -- Its versatile nature and anticipated applications