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

V. A. Ivashchenko; E. V. Palkin; V. O. Ryzhenkov; R. I. Mullyadzhanov

doi:10.1134/S0869864321010066

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

V. A. Ivashchenko, E. V. Palkin, V. O. Ryzhenkov, R. I. Mullyadzhanov

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

Аннотация

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.

Язык оригинала	английский
Страницы (с-по)	55-64
Число страниц	10
Журнал	Thermophysics and Aeromechanics
Том	28
Номер выпуска	1
DOI	https://doi.org/10.1134/S0869864321010066
Состояние	Опубликовано - янв 2021

Предметные области OECD FOS+WOS

1.07 ПРОЧИЕ ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ
1.01 МАТЕМАТИКА
2.03 МЕХАНИКА И МАШИНОСТРОЕНИЕ
2.03.DT ТЕРМОДИНАМИКА
2.03.PU МЕХАНИКА

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

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.",

keywords = "direct numerical simulation, DNS, jets, POD, proper orthogonal decomposition, turbulence",

author = "Ivashchenko, {V. A.} and Palkin, {E. V.} and Ryzhenkov, {V. O.} and Mullyadzhanov, {R. I.}",

note = "Funding Information: The work was partially supported by the Russian Foundation for Basic Research (Grants No. 18-38-20167 and No. 19-08-01227), the development of the computational code was carried out within the framework of the state task for IT SB RAS. Publisher Copyright: {\textcopyright} 2021, V.A. Ivashchenko, E.V. Palkin, V.O. Ryzhenkov, and R.I. Mullyadzhanov. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

month = jan,

doi = "10.1134/S0869864321010066",

language = "English",

volume = "28",

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journal = "Thermophysics and Aeromechanics",

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POD-analysis of the near field of a turbulent circular jet when mixing gases of different densities. / Ivashchenko, V. A.; Palkin, E. V.; Ryzhenkov, V. O.; Mullyadzhanov, R. I.

В: Thermophysics and Aeromechanics, Том 28, № 1, 01.2021, стр. 55-64.

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

TY - JOUR

T1 - POD-analysis of the near field of a turbulent circular jet when mixing gases of different densities

AU - Ivashchenko, V. A.

AU - Palkin, E. V.

AU - Ryzhenkov, V. O.

AU - Mullyadzhanov, R. I.

N1 - Funding Information: The work was partially supported by the Russian Foundation for Basic Research (Grants No. 18-38-20167 and No. 19-08-01227), the development of the computational code was carried out within the framework of the state task for IT SB RAS. Publisher Copyright: © 2021, V.A. Ivashchenko, E.V. Palkin, V.O. Ryzhenkov, and R.I. Mullyadzhanov. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/1

Y1 - 2021/1

N2 - 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.

AB - 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.

KW - direct numerical simulation

KW - DNS

KW - jets

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KW - proper orthogonal decomposition

KW - turbulence

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