Tensorial Slip of Super-hydrophobic Channelsстатья
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:We describe a generalization of the tensorial slip boundary condition, originally justified for a thick (compared
to texture period) channel, to any channel thickness. The eigenvalues of the effective slip-length tensor, however,
in general case become dependent on the gap and cannot be viewed as a local property of the surface, being a
global characteristic of the channel. To illustrate the use of the tensor formalism we develop a semianalytical
theory of an effective slip in a parallel-plate channel with one superhydrophobic striped and one hydrophilic
surface. Our approach is valid for any local slip at the gas sectors and an arbitrary distance between the plates,
ranging from a thick to a thin channel. We then present results of lattice Boltzmann simulations to validate the
analysis. Our results may be useful for extracting effective slip tensors from global measurements, such as the
permeability of a channel, in experiments or simulations.