NDLI: Visualization of Vorticity and Vortices in Wall-Bounded Turbulent Flows

Content Provider	IEEE Xplore Digital Library
Author	Helgeland, A. Reif, B.A.P. Andreassen, O. Wasberg, C.E.
Copyright Year	1995
Abstract	This study was initiated by the scientifically interesting prospect of applying advanced visualization techniques to gain further insight into various spatio-temporal characteristics of turbulent flows. The ability to study complex kinematical and dynamical features of turbulence provides means of extracting the underlying physics of turbulent fluid motion. The objective is to analyze the use of a vorticity field line approach to study numerically generated incompressible turbulent flows. In order to study the vorticity field, we present a field line animation technique that uses a specialized particle advection and seeding strategy. Efficient analysis is achieved by decoupling the rendering stage from the preceding stages of the visualization method. This allows interactive exploration of multiple fields simultaneously, which sets the stage for a more complete analysis of the flow field. Multifield visualizations are obtained using a flexible volume rendering framework, which is presented in this paper. Vorticity field lines have been employed as indicators to provide a means to identify "ejection" and "sweep" regions, two particularly important spatio-temporal events in wall-bounded turbulent flows. Their relation to the rate of turbulent kinetic energy production and viscous dissipation, respectively, has been identified.
Sponsorship	IEEE Computer Society Technical Committee on Computer Graphics IEEE Computer Society
File Size	1249117
File Format	PDF
ISSN	10772626
Volume Number	13
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Data visualization Physics Kinetic energy Production Large-scale systems Numerical simulation Topology Animation Fluid dynamics Marine vehicles turbulence 3D vector field visualization unsteady flow visualization time-varying volume data features in volume data sets multifield visualization fluid dynamics
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Signal Processing Computer Vision and Pattern Recognition Software

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