Hydrodynamic interaction with super-hydrophobic surfacesстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Patterned surfaces with large effective slip lengths, such as super-hydrophobic surfaces containing
trapped gas bubbles, have the potential to reduce hydrodynamic drag. Based on lubrication theory, we
analyze an approach of a hydrophilic disk to such a surface. The drag force is predicted analytically and
formulated in terms of a correction function to the Reynolds equation, which is shown to be the
harmonic mean of corrections expressed through effective slip lengths in the two principal (fastest and
slowest) orthogonal directions. The reduction of drag is especially pronounced for a thin (compared to
texture characteristic length) gap. It is not really sensitive to the pattern geometry, but depends strongly
on the fraction of the gas phase and local slip length at the gas area.