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A predictor-corrector technique for visualizing unsteady flow

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2 Author(s)
D. C. Banks ; Inst. for Comput. Applications in Sci. & Eng., NASA Langley Res. Center, Hampton, VA, USA ; B. A. Singer

Presents a method for visualizing unsteady flow by displaying its vortices. The vortices are identified by using a vorticity-predictor pressure-corrector scheme that follows vortex cores. The cross-sections of a vortex at each point along the core can be represented by a Fourier series. A vortex can be faithfully reconstructed from the series as a simple quadrilateral mesh, or its reconstruction can be enhanced to indicate helical motion. The mesh can reduce the representation of the flow features by a factor of 1000 or more compared with the volumetric dataset. With this amount of reduction, it is possible to implement an interactive system on a graphics workstation to permit a viewer to examine, in 3D, the evolution of the vortical structures in a complex, unsteady flow

Published in:

IEEE Transactions on Visualization and Computer Graphics  (Volume:1 ,  Issue: 2 )