Local corotation of line segments and vortex identification

0351806 - ÚH 2011 RIV NZ eng C - Conference Paper (international conference)
Kolář, Václav - Moses, P. - Šístek, Jakub
Local corotation of line segments and vortex identification.
Proceedings of the 17th Australasian Fluid Mechanics Conference. Auckland: University of Auckland, 2010 - (Mallinson, G.; Cater, J.), Article no. 110. ISBN 978-0-86869-129-9.
[Australasian Fluid Mechanics Conference /17./. Auckland (NZ), 05.12.2010-09.12.2010]
R&D Projects: GA AV ČR IAA200600801
Institutional research plan: CEZ:AV0Z20600510; CEZ:AV0Z10190503
Keywords : vortex identification * vorticity * vortical structures
Subject RIV: BK - Fluid Dynamics

An easy-to-interpret local vortex intensity (i.e. near a point) is introduced and employed in 3D vortex identification. It is based on the maximum corotation of line segments found within a set of planar cross-sections going through the given point. The results obtained at higher thresholds for different vortical flows are promising. The proposed kinematic method remains applicable to compressible and variable-density flows.
Permanent Link: http://hdl.handle.net/11104/0191473