A topologically-enhanced juxtaposition tool for hybrid wind tunnel

Yuriko Takeshima, Issei Fujishiro, Shigeo Takahashi, Toshiyuki Hayase

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


We have developed a hybrid wind tunnel, where 2D measurement-integrated (MI) simulation, which utilizes actual data acquired from real air flow behind a square cylinder, plays an important role in improving the accuracy of the numerical analysis. The wind tunnel requires an accompanying visual analysis tool with which we can effectively peer into the relationships between the actual and simulated flow fields. In this paper, we attempt to exploit an augmented reality display to that end. The basic idea is to superimpose the computationally-visualized MI simulated pressure field onto the actual flow velocity structure physically-visualized with oil misttraced streaklines instantaneously. Spatial registration of these two visual sources is rather straight-forward since the fixed cylinder of the wind tunnel is easily identified, whereas visualizing the MI simulated pressure field can be characterized with a sophisticated scheme based on differential topology. Considering the fact that vortex centers are located at local minima in the pressure field, and each minimum is surrounded by a derived topological feature called ridge cycle, we can colorize the field adaptively and keep track of Karman vortex streets robustly, regardless of drastic change in the Reynolds number of the flow field.

Original languageEnglish
Title of host publicationIEEE Symposium on Pacific Visualization 2013, PacificVis 2013 - Proceedings
Number of pages8
Publication statusPublished - 2013 Dec 9
Event6th IEEE Symposium on Pacific Visualization, PacificVis 2013 - Sydney, NSW, Australia
Duration: 2013 Feb 262013 Mar 1

Publication series

NameIEEE Pacific Visualization Symposium
ISSN (Print)2165-8765
ISSN (Electronic)2165-8773


Other6th IEEE Symposium on Pacific Visualization, PacificVis 2013
CitySydney, NSW


  • Differential topology
  • juxtaposition
  • transfer function design

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Computer Vision and Pattern Recognition
  • Hardware and Architecture
  • Software


Dive into the research topics of 'A topologically-enhanced juxtaposition tool for hybrid wind tunnel'. Together they form a unique fingerprint.

Cite this