Effect of large-scale structures upon near-wall turbulence

Kaoru Iwamoto; Takahiro Tsukahara; Hideki Nakano; Hiroshi Kawamura

doi:10.1007/978-1-4020-6472-2_8

Effect of large-scale structures upon near-wall turbulence

Kaoru Iwamoto, Takahiro Tsukahara, Hideki Nakano, Hiroshi Kawamura

Department of Mechanical and Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

Direct numerical simulation (DNS) of a turbulent boundary layer has been carried out to examine the effect of the large-scale structures (LSSs) upon the near-wall turbulence. It is found by comparison with the DNS data of the Poiseuille and the Couette flows that the spanwise scales of LSSs are different among the canonical wall turbulences when normalized with the channel half width or the boundary layer thickness, and that the effect of LSSs on the near-wall turbulence depends upon the spanwise scales. We introduce a Reynolds number based on the spanwise scales, and suggest that the new Reynolds number dependence of the nearwall turbulence can be analyzed irrespective of the flow configurations at least at low-to-moderate Reynolds numbers.

Original language	English
Title of host publication	IUTAM Symposium on Computational Physics and New Perspectives in Turbulence - Proceedings of the IUTAM Symposium on Computational Physics and New Perspectives in Turbulence
Pages	55-60
Number of pages	6
DOIs	https://doi.org/10.1007/978-1-4020-6472-2_8
Publication status	Published - 2008
Event	IUTAM Symposium on Computational Physics and New Perspectives in Turbulence - Nagoya, Japan Duration: 11 Sept 2006 → 14 Sept 2006

Publication series

Name	Solid Mechanics and its Applications
Volume	4
ISSN (Print)	1875-3507

Conference

Conference	IUTAM Symposium on Computational Physics and New Perspectives in Turbulence
Country/Territory	Japan
City	Nagoya
Period	11/09/06 → 14/09/06

Keywords

Direct numerical simulation
Large-scale structures
Reynolds number dependence
Turbulent boundary layer
Wall turbulence

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10.1007/978-1-4020-6472-2_8

Cite this

Iwamoto, K., Tsukahara, T., Nakano, H., & Kawamura, H. (2008). Effect of large-scale structures upon near-wall turbulence. In IUTAM Symposium on Computational Physics and New Perspectives in Turbulence - Proceedings of the IUTAM Symposium on Computational Physics and New Perspectives in Turbulence (pp. 55-60). (Solid Mechanics and its Applications; Vol. 4). https://doi.org/10.1007/978-1-4020-6472-2_8

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abstract = "Direct numerical simulation (DNS) of a turbulent boundary layer has been carried out to examine the effect of the large-scale structures (LSSs) upon the near-wall turbulence. It is found by comparison with the DNS data of the Poiseuille and the Couette flows that the spanwise scales of LSSs are different among the canonical wall turbulences when normalized with the channel half width or the boundary layer thickness, and that the effect of LSSs on the near-wall turbulence depends upon the spanwise scales. We introduce a Reynolds number based on the spanwise scales, and suggest that the new Reynolds number dependence of the nearwall turbulence can be analyzed irrespective of the flow configurations at least at low-to-moderate Reynolds numbers.",

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author = "Kaoru Iwamoto and Takahiro Tsukahara and Hideki Nakano and Hiroshi Kawamura",

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Iwamoto, K, Tsukahara, T, Nakano, H & Kawamura, H 2008, Effect of large-scale structures upon near-wall turbulence. in IUTAM Symposium on Computational Physics and New Perspectives in Turbulence - Proceedings of the IUTAM Symposium on Computational Physics and New Perspectives in Turbulence. Solid Mechanics and its Applications, vol. 4, pp. 55-60, IUTAM Symposium on Computational Physics and New Perspectives in Turbulence, Nagoya, Japan, 11/09/06. https://doi.org/10.1007/978-1-4020-6472-2_8

Effect of large-scale structures upon near-wall turbulence. / Iwamoto, Kaoru; Tsukahara, Takahiro; Nakano, Hideki et al.
IUTAM Symposium on Computational Physics and New Perspectives in Turbulence - Proceedings of the IUTAM Symposium on Computational Physics and New Perspectives in Turbulence. 2008. p. 55-60 (Solid Mechanics and its Applications; Vol. 4).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - Direct numerical simulation (DNS) of a turbulent boundary layer has been carried out to examine the effect of the large-scale structures (LSSs) upon the near-wall turbulence. It is found by comparison with the DNS data of the Poiseuille and the Couette flows that the spanwise scales of LSSs are different among the canonical wall turbulences when normalized with the channel half width or the boundary layer thickness, and that the effect of LSSs on the near-wall turbulence depends upon the spanwise scales. We introduce a Reynolds number based on the spanwise scales, and suggest that the new Reynolds number dependence of the nearwall turbulence can be analyzed irrespective of the flow configurations at least at low-to-moderate Reynolds numbers.

AB - Direct numerical simulation (DNS) of a turbulent boundary layer has been carried out to examine the effect of the large-scale structures (LSSs) upon the near-wall turbulence. It is found by comparison with the DNS data of the Poiseuille and the Couette flows that the spanwise scales of LSSs are different among the canonical wall turbulences when normalized with the channel half width or the boundary layer thickness, and that the effect of LSSs on the near-wall turbulence depends upon the spanwise scales. We introduce a Reynolds number based on the spanwise scales, and suggest that the new Reynolds number dependence of the nearwall turbulence can be analyzed irrespective of the flow configurations at least at low-to-moderate Reynolds numbers.

KW - Direct numerical simulation

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Iwamoto K, Tsukahara T, Nakano H, Kawamura H. Effect of large-scale structures upon near-wall turbulence. In IUTAM Symposium on Computational Physics and New Perspectives in Turbulence - Proceedings of the IUTAM Symposium on Computational Physics and New Perspectives in Turbulence. 2008. p. 55-60. (Solid Mechanics and its Applications). doi: 10.1007/978-1-4020-6472-2_8

Effect of large-scale structures upon near-wall turbulence

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