Large Scale Motions in Turbulent Flows

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00503334" target="_blank" >RIV/61388998:_____/19:00503334 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2019/17-TPFM2019.pdf" target="_blank" >http://www.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2019/17-TPFM2019.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/TPFM.2019.017" target="_blank" >10.14311/TPFM.2019.017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Large Scale Motions in Turbulent Flows

Popis výsledku v původním jazyce

Quadrant analysis based on the Reynolds decomposition was performed on the data from turbulent boundary layer flows above variously rough surfaces. An estimation of a convective velocity for events significant in terms of momentum flux, and the statistics of a length and amplitude of the individual events, together with their spectral analysis, was performed. Based on the analyses, we were able to detect a few individual sweep and ejection events with a length longer than 6δ, which could be considered as very large scale motions (VLSM). We also identified number of events with a longitudinal dimension equal to approximately 3δ labelled as large scale motions (LSM). The analyses were executed for various Reynolds numbers. The number of detected structures increases with the momentum of the flow.

Název v anglickém jazyce

Large Scale Motions in Turbulent Flows

Popis výsledku anglicky

Quadrant analysis based on the Reynolds decomposition was performed on the data from turbulent boundary layer flows above variously rough surfaces. An estimation of a convective velocity for events significant in terms of momentum flux, and the statistics of a length and amplitude of the individual events, together with their spectral analysis, was performed. Based on the analyses, we were able to detect a few individual sweep and ejection events with a length longer than 6δ, which could be considered as very large scale motions (VLSM). We also identified number of events with a longitudinal dimension equal to approximately 3δ labelled as large scale motions (LSM). The analyses were executed for various Reynolds numbers. The number of detected structures increases with the momentum of the flow.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of Topical Problems of Fluid Mechanics 2019

ISBN

978-80-87012-69-7

ISSN

2336-5781

e-ISSN

—

Počet stran výsledku

6

Strana od-do

117-122

Název nakladatele

Institute of Thermomechanics of the Czech Academy of Sciences

Místo vydání

Praha

Místo konání akce

Prague

Datum konání akce

20. 2. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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