Global Stability Analysis of a Roughness Wake in a Falkner-Skan-Cooke Boundary Layer
Brynjell-Rahkola M, Schlatter P, Hanifi A, Henningson DS (2015)
Publication Type: Conference contribution
Publication year: 2015
Publisher: Elsevier
Book Volume: 14
Pages Range: 192-200
Conference Proceedings Title: Procedia IUTAM
Event location: Rio de Janeiro, BRA
DOI: 10.1016/j.piutam.2015.03.040
Abstract
A global stability analysis of a Falkner-Skan-Cooke boundary layer with distributed three-dimensional surface roughness is per- formed using high-order direct numerical simulations. Computations have been performed for different sizes of the roughness elements, and a time-stepping method has been used to find the instability modes. The study shows that a critical roughness height beyond which a global instability is excited does exist. Furthermore, the origins of this instability is examined by means of an energy analysis, which reveals the production and dissipation terms responsible for the instability, as well as the region in space where the instability originates.
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APA:
Brynjell-Rahkola, M., Schlatter, P., Hanifi, A., & Henningson, D.S. (2015). Global Stability Analysis of a Roughness Wake in a Falkner-Skan-Cooke Boundary Layer. In Marcello A.F. Medeiros, Julio R. Meneghini (Eds.), Procedia IUTAM (pp. 192-200). Rio de Janeiro, BRA: Elsevier.
MLA:
Brynjell-Rahkola, Mattias, et al. "Global Stability Analysis of a Roughness Wake in a Falkner-Skan-Cooke Boundary Layer." Proceedings of the 8th IUTAM-ABCM Symposium on Laminar Turbulent Transition, LTT 2014, Rio de Janeiro, BRA Ed. Marcello A.F. Medeiros, Julio R. Meneghini, Elsevier, 2015. 192-200.
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