Title :
Vortex tubes in turbulent flows: identification, representation, reconstruction
Author :
Banks, David C. ; Singer, Bart A.
Author_Institution :
Inst. for Comput. Applications in Sci. & Eng., NASA Langley Res. Center, Hampton, VA, USA
Abstract :
A new algorithm for identifying vortices in complex flows is presented. The scheme uses both the vorticity and pressure fields. A skeleton line along the center of a vortex is produced by a two-step predictor-corrector scheme. The technique uses the vector field to move in the direction of the skeleton line and the scalar field to correct the location in the plane perpendicular to the skeleton line. With an economical description of the vortex tube´s cross-section, the skeleton compresses the representation of the flow by a factor of 4000 or more. We show how the reconstructed geometry of vortex tubes can be enhanced to help visualize helical motion
Keywords :
data visualisation; flow simulation; flow visualisation; image reconstruction; physics computing; predictor-corrector methods; turbulence; complex flows; economical description; helical motion visualisation; pressure fields; reconstructed geometry; skeleton line; turbulent flows; two-step predictor-corrector scheme; vortex tube cross-section; vortex tubes; vorticity; Contracts; Data visualization; Economic forecasting; Geometry; Hurricanes; Large-scale systems; Motion control; NASA; Skeleton; Spirals;
Conference_Titel :
Visualization, 1994., Visualization '94, Proceedings., IEEE Conference on
Conference_Location :
Washington, DC
Print_ISBN :
0-8186-6627-7
DOI :
10.1109/VISUAL.1994.346327
