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Visualization of vo...
Visualization of vorticity and vortices in wall-bounded turbulent flows
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- Helgeland, A. (author)
- IEEE
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- Reif, Anders, 1966 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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Andreassen, O. (author)
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- Wasberg, C. E. (author)
- Forsvarets forskningsinstitutt Norge (FFI),Norwegian Defence Research Establishment (FFI)
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(creator_code:org_t)
- 2007
- 2007
- English.
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In: IEEE Transactions on Visualization and Computer Graphics. - 1941-0506 .- 1077-2626. ; 13:5, s. 1055-1066
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Abstract
Subject headings
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Keyword
- three-dimensional vector field visualization
- VECTOR-FIELDS
- visualization
- time-varying volume data
- unsteady flow
- IDENTIFICATION
- UNSTEADY-FLOW
- features in volume data sets
- fluid dynamics
- turbulence
- VORTEX
- MODELS
- multifield visualization
Publication and Content Type
- art (subject category)
- ref (subject category)
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