Journal of Visualization

, Volume 18, Issue 1, pp 47–58 | Cite as

Three-dimensional flow and surface visualization using hydrogen bubble technique

Regular Paper

Abstract

A modified hydrogen bubble technique is developed for simultaneous three-dimensional flow visualization and surface visualization on bluff bodies. A detailed description of the technique implementation and operating principles is presented. The technique is validated on two geometries: (1) a uniform circular cylinder for ReD = 1,050 and 2,100; and (2) a dual-step cylinder for ReD = 2,100, D/d = 2, and L/D = 0.5. The results demonstrate that flow visualizations effectively capture intricate three-dimensional wake vortex development including the formation of streamwise structures and vortex interactions in the wake of a dual-step cylinder. The surface visualizations capture boundary layer separation and its variation along the span of the models. Moreover, the results reveal complex three-dimensional surface flow patterns, shedding light on the topology of vortical structures forming near dual-step cylinder junctions.

Graphical Abstract

Keywords

Flow visualization Surface visualization Turbulent vortex shedding Hydrogen bubble technique 

Supplementary material

Supplementary material 1 (MPG 19156 kb)

12650_2014_219_MOESM2_ESM.mpg (7.1 mb)
Supplementary material 2 (MPG 7226 kb)
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Supplementary material 3 (MPG 7302 kb)
12650_2014_219_MOESM4_ESM.mpg (10.7 mb)
Supplementary material 4 (MPG 10962 kb)

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Copyright information

© The Visualization Society of Japan 2014

Authors and Affiliations

  1. 1.Department of Mechanical and Mechatronics EngineeringUniversity of WaterlooWaterlooCanada

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