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POD-analysis of the near field of a turbulent circular jet when mixing gases of different densities

POD-analysis of the near field of a turbulent circular jet when mixing gases of different densities A turbulent circular jet with variable density caused by the mixing of air with gases of different densities (air, helium, and carbon dioxide) is studied. The Reynolds number is fixed for all cases: Re = 5300. Using proper orthogonal decomposition and direct numerical simulation data, a comparative analysis of the three gases under consideration is carried out. It is shown that with a decrease in the ambient gas density, the frequency of coherent structures formation drops, and the number of proper orthogonal decomposition (POD) modes necessary for constructing a low-dimensional flow model decreases. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Thermophysics and Aeromechanics Springer Journals

POD-analysis of the near field of a turbulent circular jet when mixing gases of different densities

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References (40)

Publisher
Springer Journals
Copyright
Copyright © V.A. Ivashchenko, E.V. Palkin, V.O. Ryzhenkov, and R.I. Mullyadzhanov 2021
ISSN
0869-8643
eISSN
1531-8699
DOI
10.1134/s0869864321010066
Publisher site
See Article on Publisher Site

Abstract

A turbulent circular jet with variable density caused by the mixing of air with gases of different densities (air, helium, and carbon dioxide) is studied. The Reynolds number is fixed for all cases: Re = 5300. Using proper orthogonal decomposition and direct numerical simulation data, a comparative analysis of the three gases under consideration is carried out. It is shown that with a decrease in the ambient gas density, the frequency of coherent structures formation drops, and the number of proper orthogonal decomposition (POD) modes necessary for constructing a low-dimensional flow model decreases.

Journal

Thermophysics and AeromechanicsSpringer Journals

Published: May 21, 2021

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