Coherent structures and flow topology of transitional separated-reattached flow over two and three dimensional geometrical shapes

Simple item page
dc.cclicenceN/Aen
dc.contributor.authorDiabil, H. A.en
dc.contributor.authorAbdalla, I. E.en
dc.contributor.authorLi, X. K.en
dc.date.accessioned2018-03-27T14:51:14Z
dc.date.available2018-03-27T14:51:14Z
dc.date.issued2017
dc.description.abstractLarge-scale organized motions (commonly referred to coherent structures) and flow topology of a transitional separated-reattached flow have been visualised and investigated using flow visualisation techniques. Two geometrical shapes including two-dimensional flat plate with rectangular leading edge and three-dimensional square cylinder are chosen to shed a light on the flow topology and present coherent structures of the flow over these shapes. For both geometries and in the early stage of the transition, two-dimensional Kelvin-Helmholtz rolls are formed downstream of the leading edge. They are observed to be twisting around the square cylinder while they stay flat in the case of the two-dimensional flat plate. For both geometrical shapes, the two-dimensional Kelvin-Helmholtz rolls move downstream of the leading edge and they are subjected to distortion to form three-dimensional hairpin structures. The flow topology in the flat plate is different from that in the square cylinder. For the flat plate, there is a merging process by a pairing of the Kelvin-Helmholtz rolls to form a large structure that breaks down directly into many hairpin structures. For the squire cylinder case, the Kelvin-Helmholtz roll evolves topologically to form a hairpin structure. In the squire cylinder case, the reattachment length is much shorter and a forming of the three-dimensional structures is closer to the leading edge than that in the flat plate case.en
dc.funderN/Aen
dc.identifier.citationDiabil, H.A., Li, X.K. & Abdalla, I.E., (2017). Coherent structures and flow topology of transitional separated-reattached flow over two and three dimensional geometrical shapes, in AIP Conference Proceedings 1872.en
dc.identifier.doihttps://doi.org/10.1063/1.4996676
dc.identifier.urihttp://hdl.handle.net/2086/15635
dc.language.isoenen
dc.peerreviewedYesen
dc.projectidN/Aen
dc.publisherAmerican Institute of Physicsen
dc.titleCoherent structures and flow topology of transitional separated-reattached flow over two and three dimensional geometrical shapesen
dc.typeConferenceen

Files

License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
4.2 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

School of Engineering and Sustainable Development