Airfoil in Wind Tunnel

These movies were made with the Flotek 1440 wind tunnel in RIT's Department of Manufacturing and Mechanical Engineering Technology. They show air moving past an airfoil. Small (approx. 2-3 mm diameter) bubbles are in the air. They are neutrally buoyant, so their motion corresponds closely to the motion of the air around them. The movies were made at 500 frames/second with a shutter speed of 1990 microseconds. Each bubble appears as a short streak, and the length of the streak indicates how far the bubble moved in 1990 microseconds. By analyzing a movie in LoggerPro, it is possible to superimpose measured velocity vectors on the movie. The result for is shown in


To download a movie, right-click on the link and choose "Save Link as...":
QuickTime Format (playback at 500 fps):

AVI Format (playback at 30 fps):

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This material is based in part upon work supported by National Science Foundation (NSF) grants 0089380, 0424063, 0717699 and 1122828. Any opinions, findings and conclusions or recomendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.