Regular Article
QUANTITATIVE IMAGING OF THE WAKE OF A CYLINDER IN A STEADY CURRENT AND FREE-SURFACE WAVES

https://doi.org/10.1006/jfls.2000.0346Get rights and content

Abstract

The technique of high-image-density particle image velocimetry (PIV) can lead to instantaneous, global representations of the wake of a cylinder in a steady current and free-surface waves. Approaches to characterizing the complex patterns of the wake are described for several classes of experimental systems. Emphasis is on imaging in different planes, with the aim of providing insight into the quasi-two- and three-dimensional features of the near-wake.

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      Excellent reviews on the topic can be found in Bearman (1984), Simpson (2001) and Lawless et al. (2003). In the majority of the studies, a circular cylinder has been used as the bluff body (Roshko, 1993; Williamson, 1996; Rockwell et al., 2001; Downes and Rockwell, 2003; Lin et al., 2002), although studies on flow past flat plates and square cylinders are not uncommon (Lyn et al., 1995; Durao et al., 1998). Furthermore, a uniform approaching flow has been generally used for these studies.

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