A case study in selective visualization of unsteady 3D flow

Proceedings of the conference on Visualization ’02 table of contents
Boston, Massachusetts
SESSION: Session C3: mesh and flow visualization table of contents
Pages: 525 – 528
Year of Publication: 2002
Dirk Bauer
ETH Zürich, CH-8092 Zürich, Switzerland
Ronald Peikert
ETH Zürich, CH-8092 Zürich, Switzerland
Mie Sato
ETH Zürich, CH-8092 Zürich, Switzerland
Mirjam Sick
VA Tech Hydro Zürich, CH-8023 Zürich, Switzerland

ITCVG : IEEE Computer Society Technical Committee on Visualization and Graphics
SIGGRAPH: ACM Special Interest Group on Computer Graphics and Interactive Techniques
IEEE Computer Society Washington, DC, USA
Downloads (6 Weeks): 1, Downloads (12 Months): 40, Citation Count: 5

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In this case study, we explore techniques for the purpose of visualizing isolated flow structures in time-dependent data. Our primary industrial application is the visualization of the vortex rope, a rotating helical structure which builds up in the draft tube of a water turbine. The vortex rope can be characterized by high values of normalized helicity, which is a scalar field derived from the given CFD velocity data. In two related applications, the goal is to visualize the cavitation regions near the runner blades of a Kaplan turbine and a water pump, respectively. Again, the flow structure of interest can be defined by a scalar field, namely by low pressure values. We propose a particle seeding scheme based on quasi-random numbers, which minimizes visual artifacts such as clusters or patterns. By constraining the visualization to a region of interest, occlusion problems are reduced and storage efficiency is gained.

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Primary Classification:
I. Computing Methodologies
I.3.8 Applications
Additional Classification:
I. Computing Methodologies
I.4.7 Feature Measurement
Subjects: Feature representation

J. Computer Applications
Subjects: Engineering