Experimental and Numerical Investigation of Flow Oscillations in a Rectangular Cavity

[+] Author and Article Information
J. C. F. Pereira, J. M. M. Sousa

Instituto Superior Técnico/Technical University of Lisbon, Mechanical Engineering Department, Av. Rovisco Pais, 1096 Lisbon Codex, Portugal

J. Fluids Eng 117(1), 68-74 (Mar 01, 1995) (7 pages) doi:10.1115/1.2816825 History: Received January 02, 1993; Revised May 03, 1994; Online December 04, 2007


The unsteady, incompressible, moderate Reynolds number flow past a rectangular cavity is experimentally and numerically investigated. Laser-Doppler anemometry, flow visualization and unsteady numerical simulation using fully second-order accuracy in time and space, were the tools employed to meet this purpose. Large-amplitude organized oscillations are reported to occur in the investigated geometry due to fluid-dynamic instability. Detailed flow visualization and unsteady predictions clearly show that the instability process involves a complex coupling of shear layer and recirculating flowfield dynamics. The paper also demonstrates the accuracy of the present calculations.

Copyright © 1995 by The American Society of Mechanical Engineers
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