Experimental investigation of the turbulent cascade development by injection of single large-scale Fourier modes

Margherita Dotti, Rasmus Korslund Schlander, Preben Buchhave, Clara Marika Velte

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The current work presents an experimental investigation of interactions between flow scales. Injecting a single Fourier mode into a round jet flow made it possible to isolate and analyze the generation process of the high spectral components along the downstream flow development and to measure when they eventually are absorbed into the fully developed turbulence. Furthermore, an interesting dynamic evo-lution of the measured power spectra has been observed that confirms the cascaded delays reported by Josserand et al. 2017. Lately, these cascade delays have also been derived directly from a one-dimen-sional interpretation of Navier-Stokes equations described in a companion paper. The results in the current work provide vital information about the time scales in the triad interaction process.
Original languageEnglish
JournalJournal of Turbulence
ISSN1468-5248
Publication statusSubmitted - 2019

Keywords

  • Turbulent cascade
  • Triad interaction
  • Laser Doppler anemometry
  • Hot-wire ane-mometry
  • Velocity power spectrum

Cite this

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title = "Experimental investigation of the turbulent cascade development by injection of single large-scale Fourier modes",
abstract = "The current work presents an experimental investigation of interactions between flow scales. Injecting a single Fourier mode into a round jet flow made it possible to isolate and analyze the generation process of the high spectral components along the downstream flow development and to measure when they eventually are absorbed into the fully developed turbulence. Furthermore, an interesting dynamic evo-lution of the measured power spectra has been observed that confirms the cascaded delays reported by Josserand et al. 2017. Lately, these cascade delays have also been derived directly from a one-dimen-sional interpretation of Navier-Stokes equations described in a companion paper. The results in the current work provide vital information about the time scales in the triad interaction process.",
keywords = "Turbulent cascade, Triad interaction, Laser Doppler anemometry, Hot-wire ane-mometry, Velocity power spectrum",
author = "Margherita Dotti and Schlander, {Rasmus Korslund} and Preben Buchhave and Velte, {Clara Marika}",
year = "2019",
language = "English",
journal = "Journal of Turbulence",
issn = "1468-5248",
publisher = "CRC Press/Balkema",

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Experimental investigation of the turbulent cascade development by injection of single large-scale Fourier modes. / Dotti, Margherita; Schlander, Rasmus Korslund; Buchhave, Preben; Velte, Clara Marika.

In: Journal of Turbulence, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Experimental investigation of the turbulent cascade development by injection of single large-scale Fourier modes

AU - Dotti, Margherita

AU - Schlander, Rasmus Korslund

AU - Buchhave, Preben

AU - Velte, Clara Marika

PY - 2019

Y1 - 2019

N2 - The current work presents an experimental investigation of interactions between flow scales. Injecting a single Fourier mode into a round jet flow made it possible to isolate and analyze the generation process of the high spectral components along the downstream flow development and to measure when they eventually are absorbed into the fully developed turbulence. Furthermore, an interesting dynamic evo-lution of the measured power spectra has been observed that confirms the cascaded delays reported by Josserand et al. 2017. Lately, these cascade delays have also been derived directly from a one-dimen-sional interpretation of Navier-Stokes equations described in a companion paper. The results in the current work provide vital information about the time scales in the triad interaction process.

AB - The current work presents an experimental investigation of interactions between flow scales. Injecting a single Fourier mode into a round jet flow made it possible to isolate and analyze the generation process of the high spectral components along the downstream flow development and to measure when they eventually are absorbed into the fully developed turbulence. Furthermore, an interesting dynamic evo-lution of the measured power spectra has been observed that confirms the cascaded delays reported by Josserand et al. 2017. Lately, these cascade delays have also been derived directly from a one-dimen-sional interpretation of Navier-Stokes equations described in a companion paper. The results in the current work provide vital information about the time scales in the triad interaction process.

KW - Turbulent cascade

KW - Triad interaction

KW - Laser Doppler anemometry

KW - Hot-wire ane-mometry

KW - Velocity power spectrum

M3 - Journal article

JO - Journal of Turbulence

JF - Journal of Turbulence

SN - 1468-5248

ER -