Of course air flow does not have to be supersonic to create density variations; subsonic wind tunnels can be equipped with schlieren optics as well. HVAC as you’ve never seen it before.

In this historical photo from the U.S. space agency, an F-16 Scamp model being tested in the BART on Oct. 6, 1992. The photo shows a basic flow visualization test using smoke and a laser light ...

Flow visualization is the process of making the physics of fluid flows (gases, liquids) visible.At the University of Colorado we have a course for mixed teams of engineering and fine arts photography ...