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国际流体力学研究期刊
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN 打印: 2152-5102
ISSN 在线: 2152-5110

国际流体力学研究期刊

DOI: 10.1615/InterJFluidMechRes.v28.i1-2.120
pages 164-172

Pulsating Laminar Flow in a Duct with Easily Penetrable Roughness near Walls

Ye. A. Gayev
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine

ABSTRACT

Stabilized motion of a viscous fluid in a long plane duct with the easily penetrable roughness (EPR) over walls (i.e., a layer with a distributed mass force proportional to the local velocity) has been considered under the periodically changing pressure gradient. By means of an analytical solution in complex numbers, distributions of the velocity and shear stress have been plotted across the duct for different time moments with the absence or presence of the EPR. The influence of the EPR on the periodical flow appeared to be drastically dependent on the frequency of pressure changes. Results may be used in pneumatics or hydroautomatics, and in biological fluid mechanics.


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