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Flow and Drop Transport Along Liquid-Infused Surfaces
Annual Review of Fluid Mechanics ( IF 25.4 ) Pub Date : 2022-01-05 , DOI: 10.1146/annurev-fluid-030121-113156
Steffen Hardt 1 , Glen McHale 2
Affiliation  

Liquid-infused surfaces (LISs) are composite solid–liquid surfaces with remarkable features such as liquid repellency, self-healing, and the suppression of fouling. This review focuses on the fluid mechanics on LISs, that is, the interaction of surfaces with a flow field and the behavior of drops on such surfaces. LISs can be characterized by an effective slip length that is closely related to their drag reduction property, which makes them suitable for several applications, especially for turbulent flows. Drag reduction, however, is compromised by failure mechanisms such as the drainage of lubricant from surface textures. The flow field can also sculpt the lubricant layer in a coupled self-organization process. For drops, the lubricant reduces drop pinning and increases drop mobility, but also results in a wetting ridge and the associated concept of an apparent contact angle. Design of LIS wettability and topography can induce low-friction drop motion, and drops can dynamically shape the lubricant ridges and film thickness.

中文翻译:


沿液体注入表面的流动和液滴传输

液体注入表面 (LIS) 是复合固液表面,具有拒液性、自愈性和抑制结垢等显着特征。本综述重点关注 LIS 上的流体力学,即表面与流场的相互作用以及液滴在此类表面上的行为。LIS 的特征在于有效滑移长度与其减阻性能密切相关,这使得它们适用于多种应用,尤其是湍流。然而,减阻会受到失效机制的影响,例如润滑剂从表面纹理中排出。流场还可以在耦合的自组织过程中雕刻润滑剂层。对于液滴,润滑剂减少液滴钉扎并增加液滴流动性,但也会导致润湿脊和相关的表观接触角概念。LIS 润湿性和形貌的设计可以引起低摩擦的液滴运动,并且液滴可以动态地塑造润滑剂脊和油膜厚度。

更新日期:2022-01-06
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