Global Stability Analysis of a Roughness Wake in a Falkner-Skan-Cooke Boundary Layer
2015 (English)In: Procedia IUTAM, Elsevier, 2015, 192-200 p.Conference paper (Refereed)
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.
Place, publisher, year, edition, pages
Elsevier, 2015. 192-200 p.
energy analysis, Falkner-Skan-Cooke (FSC), global instability, surface roughness, Atmospheric thermodynamics, Boundary layers, Energy management, Stability, Falkner-Skan, Falkner-Skan-Cooke boundary layers, Global stability analysis, Roughness elements, Three-dimensional surface, Time stepping method
IdentifiersURN: urn:nbn:se:kth:diva-176117DOI: 10.1016/j.piutam.2015.03.040ISI: 000380499200023ScopusID: 2-s2.0-84940645851OAI: oai:DiVA.org:kth-176117DiVA: diva2:874718
8th IUTAM-ABCM Symposium on Laminar Turbulent Transition, LTT 2014, 8 September - 12 September 2014
QC 201511272015-11-272015-11-022016-08-30Bibliographically approved