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Parametric Study on Ridges Inducing Secondary Motions in Turbulent Channel Flow

Deyn, Lars H. von; Gatti, Davide; Frohnapfel, Bettina; Stroh, Alexander

Abstract (englisch):
A DNS parametric study of streamwise‐aligned rectangular ridges is carried out in a fully developed turbulent channel flow with constant flow rate at $Reb = 18000$. The simulations were carried out systematically varying the ridge height h, width w and structural wavelength $S$. The ridges generate a strong large‐scale secondary motion, which is measured in terms of the integral swirl strength. Of the presented cases, the configuration with the ridge height$ h = 0.1 \delta$, $S/w = 4$, $ S = 1 \delta$ produces the strongest secondary flow of $4.5\%$ $U_b$. The varying flow topology is discussed as a result of the varying ridge dimensions.

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Verlagsausgabe §
DOI: 10.5445/IR/1000130169
Veröffentlicht am 02.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Strömungsmechanik (ISTM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2021
Sprache Englisch
Identifikator ISSN: 1617-7061, 1617-7061
KITopen-ID: 1000130169
Erschienen in Proceedings in applied mathematics and mechanics
Verlag Wiley-VCH Verlag
Band 20
Heft 1
Seiten e202000139PAMM
Vorab online veröffentlicht am 25.01.2021
Schlagwörter fluid mechanics, DNS, secondary motions, topology
Nachgewiesen in Dimensions
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