E.T.S.I. Aeronáuticos, Universidad Politécnica de Madrid, Plaza Cardenal Cisneros 3, 28040 Madrid, Spain.
Adv Colloid Interface Sci. 2014 Apr;206:106-15. doi: 10.1016/j.cis.2013.10.017. Epub 2013 Oct 29.
A review is presented of the dynamic behavior of confined fluid systems with interfaces under monochromatic mechanical forcing, emphasizing the associated spatio-temporal structure of the fluid response. At low viscosity, vibrations significantly affect dynamics and always produce viscous mean flows, which are coupled to the primary oscillating flow and evolve on a very slow timescale. Thus, unlike the primary oscillating flow, mean flows may easily interact with the surface rheology, which generates dynamics that usually exhibit a much slower timescale than that of typical gravity-capillary waves. The review is made with an eye to the typical experimental devices used to measure surface properties, which usually consist of periodically forced, symmetric fluid systems with interfaces. The current theoretical description of these systems ignores the fluid mechanics, which could play a larger role than presently assumed.
本文综述了在单色机械力作用下具有界面的受限流体系统的动力学行为，重点研究了流体响应的相关时空结构。在低粘度下，振动会显著影响动力学，并且总会产生粘性平均流，这些平均流与主要的振荡流耦合，并在非常缓慢的时间尺度上演变。因此，与主要的振荡流不同，平均流可能很容易与表面流变学相互作用，从而产生通常具有比典型重力-毛细波慢得多的时间尺度的动力学。综述着眼于用于测量表面性质的典型实验设备，这些设备通常由周期性受迫的、对称的具有界面的流体系统组成。目前对这些系统的理论描述忽略了流体力学，而流体力学可能比目前所假设的更为重要。
