WIT Press


Flow Visualization And Velocity Measurements In The Turbulent Boundary Layer Of A Laboratory Shallow Channel

Price

Free (open access)

Paper DOI

10.2495/AFM980321

Volume

18

Pages

9

Published

1998

Size

993 kb

Author(s)

J. Espinoza, J. Rojas, P. Martinez-Austria and S. Vargas

Abstract

Flow visualization and velocity measurements were obtained in an open channel of 20 m length and 1 m width and 0.08 m depth, with a Reynolds number of 12000. The test section had a glass lateral wall and acrylic bottom wall to allow optical access. The images of dye injected at the bottom of the channel were recorded with two video cameras and velocities were measured with a hot film anemometer. The two video cameras and the velocity measurements were synchronized; correlation of the image and traced velocity were processed in a computer. When the velocity sensor was located at about 50 wall units, the velocity increased when a shear layer

Keywords