Experiment on Laminar Flow in a Rotating, Curved Duct of Rectangular Cross Section

[+] Author and Article Information
Mark D. Hoover

Inhalation Toxicology Research Institute, Lovelace Biomedical and Environmental Research Institute, Albuquerque, N. Mex. 87185

Werner Stöber, Gerd Morawietz

Fraunhofer-Institut für Toxikologie Und Aerosolforschung, Nottulner Landweg 102, D-4400 Münster-Roxel, Federal Republic of Germany

J. Fluids Eng 106(1), 38-44 (Mar 01, 1984) (7 pages) doi:10.1115/1.3242399 History: Received February 08, 1983; Online October 26, 2009


Experimental results are presented here for laminar flow in a rotating, curved duct of rectangular cross section. The duct geometry is that of the spiral duct aerosol centrifuge designed by Stöber and Flachsbart (1969). Primary velocity was measured by laser Doppler anemometry. Secondary flow velocity was characterized by dye injection. The experiment was done in a dynamically similar Plexiglas mock-up of the centrifuge. Water flow in the mock-up simulated air flow in the aerosol centrifuge. The Reynolds number based on hydraulic diameter was 500. The Rossby number was 0.16. The duct aspect ratio was 3.3. Results are compared for flow in a straight stationary duct, the curved duct with no rotation, the curved duct with rotation in the direction of flow and the curved duct with rotation in the direction opposite of flow. There is agreement between the observed flow and the boundary layer theory of Ludwieg (1951).

Copyright © 1984 by ASME
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