Standard

Reverse flow phenomenon in duct corners at a low Reynolds number. / Zaripov, Dinar; Ivashchenko, Vladislav; Mullyadzhanov, Rustam et al.

In: Physics of Fluids, Vol. 33, No. 8, 085130, 01.08.2021.

Research output: Contribution to journal › Article › peer-review

Harvard

Zaripov, D, Ivashchenko, V, Mullyadzhanov, R, Li, R, Markovich, D & Kähler, CJ 2021, 'Reverse flow phenomenon in duct corners at a low Reynolds number', Physics of Fluids, vol. 33, no. 8, 085130. https://doi.org/10.1063/5.0055859

APA

Zaripov, D., Ivashchenko, V., Mullyadzhanov, R., Li, R., Markovich, D., & Kähler, C. J. (2021). Reverse flow phenomenon in duct corners at a low Reynolds number. Physics of Fluids, 33(8), [085130]. https://doi.org/10.1063/5.0055859

Vancouver

Zaripov D, Ivashchenko V, Mullyadzhanov R, Li R, Markovich D, Kähler CJ. Reverse flow phenomenon in duct corners at a low Reynolds number. Physics of Fluids. 2021 Aug 1;33(8):085130. doi: 10.1063/5.0055859

Author

Zaripov, Dinar ; Ivashchenko, Vladislav ; Mullyadzhanov, Rustam et al. / Reverse flow phenomenon in duct corners at a low Reynolds number. In: Physics of Fluids. 2021 ; Vol. 33, No. 8.

BibTeX

@article{874c3f1b55e349b097d493e042b2d047,
title = "Reverse flow phenomenon in duct corners at a low Reynolds number",
abstract = "In recent years, the near-wall reverse flow (NWRF) phenomenon taking place in wall-bounded turbulent flows has become the subject of comprehensive theoretical and experimental study. Currently, it is generally accepted that the NWRF events are caused by strong near-wall vortical structures located in the buffer region of the boundary layer, which are either quasi-streamwise vortices tilted with respect to a mean flow direction or transversely oriented hairpin-like vortices. In the present investigations, we demonstrate that there is at least one more mechanism that differs from the existing ones. Considering a fully developed turbulent duct flow studied by direct numerical simulations at a relatively low Reynolds number Reτ = 204, we found the presence of the NWRF events in the corner regions. The frequency of their appearance is three orders of magnitude higher than those appearing in the central area of the wall, and their lifetime is about three times longer. The mechanism of their formation is found to be associated with streamwisely oriented vortical structures located near the corner. ",
author = "Dinar Zaripov and Vladislav Ivashchenko and Rustam Mullyadzhanov and Renfu Li and Dmitriy Markovich and K{\"a}hler, {Christian J.}",
note = "Funding Information: Numerical simulations and data analysis were conducted within the Russian Science Foundation, Grant No. 19–79-30075. The computational resources were provided by the Ministry of Science and Higher Education of the Russian Federation, Project No. 075–15-2019–1888. Publisher Copyright: {\textcopyright} 2021 Author(s).",
year = "2021",
month = aug,
day = "1",
doi = "10.1063/5.0055859",
language = "English",
volume = "33",
journal = "Physics of Fluids",
issn = "1070-6631",
publisher = "American Institute of Physics",
number = "8",

}

RIS

TY - JOUR

T1 - Reverse flow phenomenon in duct corners at a low Reynolds number

AU - Zaripov, Dinar

AU - Ivashchenko, Vladislav

AU - Mullyadzhanov, Rustam

AU - Li, Renfu

AU - Markovich, Dmitriy

AU - Kähler, Christian J.

N1 - Funding Information: Numerical simulations and data analysis were conducted within the Russian Science Foundation, Grant No. 19–79-30075. The computational resources were provided by the Ministry of Science and Higher Education of the Russian Federation, Project No. 075–15-2019–1888. Publisher Copyright: © 2021 Author(s).

PY - 2021/8/1

Y1 - 2021/8/1

N2 - In recent years, the near-wall reverse flow (NWRF) phenomenon taking place in wall-bounded turbulent flows has become the subject of comprehensive theoretical and experimental study. Currently, it is generally accepted that the NWRF events are caused by strong near-wall vortical structures located in the buffer region of the boundary layer, which are either quasi-streamwise vortices tilted with respect to a mean flow direction or transversely oriented hairpin-like vortices. In the present investigations, we demonstrate that there is at least one more mechanism that differs from the existing ones. Considering a fully developed turbulent duct flow studied by direct numerical simulations at a relatively low Reynolds number Reτ = 204, we found the presence of the NWRF events in the corner regions. The frequency of their appearance is three orders of magnitude higher than those appearing in the central area of the wall, and their lifetime is about three times longer. The mechanism of their formation is found to be associated with streamwisely oriented vortical structures located near the corner.

AB - In recent years, the near-wall reverse flow (NWRF) phenomenon taking place in wall-bounded turbulent flows has become the subject of comprehensive theoretical and experimental study. Currently, it is generally accepted that the NWRF events are caused by strong near-wall vortical structures located in the buffer region of the boundary layer, which are either quasi-streamwise vortices tilted with respect to a mean flow direction or transversely oriented hairpin-like vortices. In the present investigations, we demonstrate that there is at least one more mechanism that differs from the existing ones. Considering a fully developed turbulent duct flow studied by direct numerical simulations at a relatively low Reynolds number Reτ = 204, we found the presence of the NWRF events in the corner regions. The frequency of their appearance is three orders of magnitude higher than those appearing in the central area of the wall, and their lifetime is about three times longer. The mechanism of their formation is found to be associated with streamwisely oriented vortical structures located near the corner.

UR - http://www.scopus.com/inward/record.url?scp=85113593371&partnerID=8YFLogxK

U2 - 10.1063/5.0055859

DO - 10.1063/5.0055859

M3 - Article

AN - SCOPUS:85113593371

VL - 33

JO - Physics of Fluids

JF - Physics of Fluids

SN - 1070-6631

IS - 8

M1 - 085130

ER -

ID: 34086169