Turbulent Flow Over a Plane Symmetric Sudden Expansion

[+] Author and Article Information
R. Smyth

Department of Mechanical Engineering, University of Sheffield, England

J. Fluids Eng 101(3), 348-353 (Sep 01, 1979) (6 pages) doi:10.1115/1.3448974 History: Received June 19, 1979; Online October 12, 2010


Turbulent flow with separation and recirculation over a double backward facing step has been investigated experimentally. Time mean stream wise, transverse and cross-stream components of the velocity fluctuations, together with turbulence kinetic energy and Reynolds shear stresses, were measured using a laser Doppler anemometer, operating in the differential Doppler mode with forward scattering. Ordinary tap water was used in a closed loop flow system with a Reynolds number of 30,210 and significant changes of flow patterns, increases in turbulence kinetic energy, velocity fluctuations and shear stresses were observed downstream of the step expansion.

Copyright © 1979 by ASME
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