Properties of the fluid flow in a cylindrical duct with stenoses

1Vovk, IV, 2Trotsenko, Ya.P
1Institute of Hydromechanics of the NAS of Ukraine, Kyiv
2Taras Shevchenko National University of Kyiv
Dopov. Nac. akad. nauk Ukr. 2017, 9:33-40
Section: Mechanics
Language: Ukrainian

The flow of a viscous incompressible fluid in a cylindrical duct with two serial contractions (stenoses) is studied by the numerical solution of unsteady Navier—Stokes equations. It is shown that an ensemble of vortex  structures develops in the system that causes stable periodic self-sustained oscillations of the velocity profile at the outlet of the second stenosis orifice.

Keywords: duct with stenoses, self-sustained oscillations, vortex structures
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