Interpretation of the mechanism responsible for the persistence of a laminar region in turbulent duct flow

Daschiel G, Frohnapfel B, Jovanovic J (2013)

Publication Type: Conference contribution

Publication year: 2013

Publisher: Zakon Group LLC

Conference Proceedings Title: ETC 2013 - 14th European Turbulence Conference

Event location: Lyon FR

Abstract

The flow field in an isosceles triangular duct with a small apex angle of 11.5◦ is investigated using direct numerical simulation at the hydraulic Reynolds number Reh = 4500. Within the duct cross-section regions with essential laminar and turbulent properties are found to exist next to each other. From analysis of this flow field we gain insights into the mechanisms responsible for the flow laminarisation towards the corner of the duct, which leads to a significant reduction of the skin friction. In addition, further investigations of the disturbances appearing in the laminar part of the flow domain indicate a possible application of corners for the delay of laminar to turbulent transition in duct flows.

Authors with CRIS profile

Jovan Jovanovic Lehrstuhl für Strömungsmechanik

Involved external institutions

Karlsruhe Institute of Technology (KIT) DE Germany (DE)

How to cite

APA:

Daschiel, G., Frohnapfel, B., & Jovanovic, J. (2013). Interpretation of the mechanism responsible for the persistence of a laminar region in turbulent duct flow. In ETC 2013 - 14th European Turbulence Conference. Lyon, FR: Zakon Group LLC.

MLA:

Daschiel, Gerti, Bettina Frohnapfel, and Jovan Jovanovic. "Interpretation of the mechanism responsible for the persistence of a laminar region in turbulent duct flow." Proceedings of the 14th European Turbulence Conference, ETC 2013, Lyon Zakon Group LLC, 2013.

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