CashFlow, A Visualization Framework for 3D Flow - Studierstube ...

Related Work2.2. Flow Visualization AlgorithmsFigure 2.35: Colored Flow field topology extraction in 2D[XTH00]. Red and green dots mark criticalpoints.Vorticity & TurbulenceOne of the important flow features are vortical phenomena. In most flow field analysisit is very important to locate turbulence and centers of vorticity. Either these regionsare desired in specific locations or they have to be avoided strictly. For example, onthe one hand vorticity and turbulence at the rear spoiler of a car are very important forgood aerodynamics. On the other hand vorticity in the front part of an aeroplane winghas to be avoided. The detection of vortical phenomena was addressed by [HGPR99]and [Sad99]. Recently Stegmaier ported vortex detection to the GPU [SE04] as shownin figure 2.20.Another concept for flow topology detection was also published by [dv99]. Thecreation of vector field hierarchies [BHH99] was one of the low level. The pure visualizationof flow field topologies was addressed by [XTH00] and by [TTS03] in anartistic way similar to [Löf98][HLG98]. Most recent work on vortex visualization waspublished by Garth et al.[CG04].Figure 2.36: Topological Skeleton Visualization in 3D [HTS03].34