Effective Slip over Superhydrophobic Surfaces in Thin Channelsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Superhydrophobic surfaces reduce drag by combining hydrophobicity and roughness to trap gas
bubbles in a microscopic texture. Recent work has focused on specific cases, such as arrays of pillars
or grooves, with limited theoretical guidance. Here, we consider the experimentally relevant limit of thin
channels and obtain rigorous bounds on the effective slip length for any two-component (e.g., low-slip and
high-slip) texture with given area fractions. Among all anisotropic textures, parallel stripes attain the
largest (or smallest) possible slip in a straight, thin channel for parallel (or perpendicular) orientation with
respect to the mean flow. Tighter bounds for isotropic textures further constrain the effective slip. These
results provide a framework for the rational design of superhydrophobic surfaces.