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Proceedings Paper

Three-Dimensional Measurement, Display, and Interpretation of Fluid Flow Datasets
Author(s): Minami Yoda; Lambertus Hesselink
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Paper Abstract

The three-dimensional structure of the flow around a delta wing with tangential leading edge blowing is visualized. The flow is "sliced" by a scanning laser light sheet into a set of two-dimensional cross sections, resulting in a set of three-dimensional data. The light scattered off smoke particles in the flow during a 30 ns laser pulse is imaged onto a high speed camera. The measurement period of a few milliseconds is brief enough to image the flow "instantaneously" (i.e. to within the resolution of the apparatus). The resulting cross sections are digitized and filtered to reduce noise. The STANSURFS software package developed in the Fourier Optics and Optical Diagnostics lab at Stanford is used to threshold the pictures at a prespecified value, stack the thresholded crossections, and reconstruct the three-dimensional flow field at that threshold using cubic B-splines. The resulting structures are displayed in stereo pairs and viewed in three dimensions. Various display techniques including clipping the surface to reveal interior details and rotating the viewer perspective around the structure are used to gain further insight into the three-dimensional nature of this and other flows.

Paper Details

Date Published: 11 September 1989
PDF: 6 pages
Proc. SPIE 1083, Three-Dimensional Visualization and Display Technologies, (11 September 1989); doi: 10.1117/12.952878
Show Author Affiliations
Minami Yoda, Stanford University (United States)
Lambertus Hesselink, Stanford University (United States)

Published in SPIE Proceedings Vol. 1083:
Three-Dimensional Visualization and Display Technologies
Scott S. Fisher; Woodrow E. Robbins, Editor(s)

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