Forces on Cylinders and Spheres in a Sinusoidally Oscillating Fluid

[+] Author and Article Information
T. Sarpkaya

Naval Postgraduate School, Monterey, Calif.

J. Appl. Mech 42(1), 32-37 (Mar 01, 1975) (6 pages) doi:10.1115/1.3423549 History: Received August 01, 1974; Online July 12, 2010


The in-line and transverse forces acting on circular cylinders and the in-line force acting on spheres immersed in a harmonically oscillating fluid in a U-shaped vertical tunnel have been measured. The drag, inertia, and the transverse force (lift) coefficients have been determined through the use of a Fourier analysis and found to depend on a period parameter. The results have shown that the transverse force on cylinders is as large as the in-line force and alternates at frequencies ranging from one to four times the driving frequency of the fluid within the range of subcritical Reynolds numbers encountered in the investigation.

Copyright © 1975 by ASME
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