Comparison of flow structures in the wake region of two similar normal flat plates in tandem and a square cylinder

Experimental study on suppression of vortex street behind perforated square cylinder

“…In contrast, the two low level zones are shifted towards the centerline behind the perforated square cylinder. Such a flow pattern is comparable to the streamwise velocity in the wake region of the square cylinder as reported by Hacışevki and Teimourian (2015). Figure 6 illustrates the phase averaged transverse velocity component contours at two different distances downstream the wake region.…”

“…Such fluctuating forces are the main concern during design stages of industrial systems where the vortexinduced vibration can have an undesirable effect on the structure. In the context of a square cylinder, Okajima (1982), Saha et al (2000), Saha (2013), Hacışevki and Teimourian (2015), Sohankar et al (2015b) and many other researchers conducted extensive studies on the vortex shedding phenomenon. They investigated different features of vortex shedding behind square cylinders and reported wake flow structures, Strouhal number variation and other aerodynamic parameters.…”

Effect of Gap Ratio on the Wake behind Two Side-by-Side Flat Plates

“…On the other hand, studies on bluff bodies with multiple square cylinders (Liu and Chen, 2002;Yen and Liu, 2011;Alam et al, 2011;Burattini and Agrawal, 2013;Han et al, 2014;Chatterjee and Biswas, 2015) or flat plates has received little attention even though most structures around us are slender structures with quadrilateral cross sections. Especially, a limited number of studies on the flow around multiple flat plates have been reported (Hirano et al, 1983;Williamson, 1985;Hayashi et al, 1986;Miau et al, 1992;Higuchi et al, 1994;Hacisevki and Teimourian, 2015;Teimourian et al, 2017). For the flow normal to the flat plates in sideby-side arrangement, for example, Hayashi et al (1986) conducted experimental investigation of the wake interference of a row of multiple flat plates by the visualization and showed that the gap flow could be classified into three flow patterns depending on the gap ratio: biased flow in the same direction, flipflopping flow and unbiased flow.…”

Experimental investigation of wake evolution behind a couple of flat discs in a hydrochannel

“…The literature presents only the studies on the near wake [1−3]. The focus of these studies is concentrated on determining the effect of a distance between bodies L on the scenario of the development of large-scale fluctuations of the near wake and changes in their Strouhal numbers in comparison with the flow around the single bodies [2,3]. The distinctive feature here is weak dependence between the frequency of lowfrequency fluctuations and an increase in the distance between the bodies after some critical value.…”

“…It draws particular attention when assessing the wind loads on the repeating elements in the construction of bridges, buildings, chimney pipes, and other civil facilities. Each specific technical application is characterized by certain geometry, and, as a consequence, the specific behavior of the wake, but their identification requires first the examination of flow behavior around some canonical configurations consisting, for example, of two or more round cylinders and spheres [1], rectangular [2] and circular [3] plates. The similar sets of repeating samples can be useful for solving various engineering problems.…”