6. Physics of a Fluid, Neutral and Ionized Gases

Experimental Study by Optical and Statistical Methods of Large-Scale Velocity Fluctuations in the Flow Past a Cylinder

Sergey S. Abdurakipov
1. Institute of Thermophysics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
s.s.abdurakipov@gmail.com
Konstantin G. Dobroselsky
1. Kutateladze Institute of Thermophysics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
dobroselsky@mail.ru
The material was received by the Editorial Board: 13.06.2019
Abstract
Using an optical method for measuring the velocity fields Particle Image Velocimetry (PIV) and a statistical method for analyzing coherent structures in turbulent flows Proper Orthogonal Decomposition (POD), an experimental study of the spatial structure of large-scale velocity fluctuations in the precavitational and cavitational flow past a circular cylinder with a Reynolds number of 280 000 was carried out.

Keywords
cavitation flow around a cylinder, large-scale vortices, particle image velocimetry, proper orthogonal decomposition
Funding
The research was supported by the Russian Science Foundation (grant No. 19-79-30075)
УДК 532.542.4, 532.574.7, 532.582.3

Experimental Study by Optical and Statistical Methodsof Large-Scale Velocity Fluctuations in the Flow Past a Cylinder
References: Abdurakipov S. S., Dobroselsky K. G. Experimental Study by Optical and Statistical Methods of Large-Scale Velocity Fluctuations in the Flow Past a Cylinder . Siberian Journal of Physics . 2019, vol. 14, no. 3. P. 5–14. (in Russ.). DOI: 10.25205/2541-9447-2019-14-3-5-14