Shear Flow of a Viscous Fluid over a Cavity with a Pulsating Gas Bubble

被引：4

作者：

Ageev, A. I. ^{[1
]}

Osiptsov, A. N. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Inst Mech, Moscow, Russia

来源：

DOKLADY PHYSICS | 2020年 / 65卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

superhydrophobic surface; gas bubble; friction reduction; boundary integral equation method; averaged shear stress;

D O I：

10.1134/S1028335820050031

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

For the first time, the effect of pressure fluctuations on the averaged shear stress in a shear viscous flow over a two-dimensional rectangular microcavity containing a pulsating gas bubble is studied. This problem formulation can be regarded as a model of a fluid flow in a viscous sublayer of a turbulent boundary layer in a vicinity of microcavities of a striped superhydrophobic surface. The aim of the study is to analyze possible non-stationary mechanisms resulting in an average velocity slip and a friction reduction in a turbulent boundary layer on a superhydrophobic surface. The method of boundary integral equations is used to solve numerically the Stokes equations describing a shear-driven viscous flow in a viscous sublayer over a single microcavity containing a compressible gas bubble.

引用

页码：242 / 245

页数：4

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