The time development of counter-rotating vortices, which are formed in the early stages of impulsively started laminar lid-driven cavity flows, is investigated by experimental visualizations using the particle streak technique with the aim of explaining the successive phases of their establishment. The standard square-section cavity of aspect ratio 1:1:2 has been selected for this study and the results presented are for the Reynolds numbers 1,000, 2,000, and 3,200. A detailed analysis of streamline fields evolution clearly shows, for the first time, that the transient appearance of the Taylor-Gortler-type counter-rotating vortices succeeds four main phases. Each of them has been associated to a critical value of a Taylor-Gortler control parameter.
Experiments in Fluids – Springer Journals
Published: Oct 2, 2002
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