IEEE Trans Vis Comput Graph - Visualizing the Evolution and Interaction of Vortices and Shear Layers in Time-Dependent 3D Flow.

Tópicos

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Resumo

In this paper, we present a visualization and tracking system for coherent structures. For this purpose, we propose to consider shear stress—the stretching and shear of particles inside a flow—in vortex dynamics. Based on a discussion and comparison of recent methods for computing shear stress, we introduce visualization techniques in order to provide a representation of shear layers according to their physical interpretation. This paper contributes a combination of theory in fluid mechanics and the corresponding visualization: (1) shear layer criteria are assessed according to how well they can be combined with common vortex identification criteria; (2) sheets of maximal shear are introduced as an appropriate visual representation of shear layers; (3) a visualization method is described for simultaneous tracking of vortices and shear layers as well as their interaction; (4) the relevance of shear layers in vortex dynamics is demonstrated by means of several examples. We have implemented these new techniques in an interactive visualization system for time-dependent 3D flow. The system is used by fluid-mechanics experts in their research of shear-vortex interaction.

Resumo Limpo

paper present visual track system coher structur purpos propos consid shear stressxth stretch shear particl insid flowxin vortex dynam base discuss comparison recent method comput shear stress introduc visual techniqu order provid represent shear layer accord physic interpret paper contribut combin theori fluid mechan correspond visual shear layer criteria assess accord well can combin common vortex identif criteria sheet maxim shear introduc appropri visual represent shear layer visual method describ simultan track vortic shear layer well interact relev shear layer vortex dynam demonstr mean sever exampl implement new techniqu interact visual system timedepend d flow system use fluidmechan expert research shearvortex interact

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