Large-scale structures in dipole and quadrupole wakes of a wall-mounted finite rectangular cylinder

A review of flow-induced noise from finite wall-mounted cylinders

“…The first authors to describe this shedding model for such aspect ratio cylinders were Wang and Zhou (2009), and hence this will be referred to as the 'Wang model'. Bourgeois et al (2011Bourgeois et al ( , 2013 and Hosseini et al (2013) propose a related but inherently different model to that of the Wang model, known as the 'Bourgeois model' . The vortex filaments are shed periodically from either side and are continuously linked at both extremities with connector strands, leading to a fully connected alternating looped structure that is convected downstream.…”

“…Flow around the cylinder sides enters into a regular alternating von Kármán vortex street. The pressure difference between the lee side of the FWMC and the oncoming free stream induces downwash (downward motion of the separated shear layer Baker (1980) 1980Farivar (1981 1981 Ayoub and Karamcheti (1982) 1982 Sakamoto and Arie (1983) 1983 Kawamura et al (1984) 1984 Sakamoto and Oiwake (1984) 1984 Budair et al (1991) 1991 Baban and So (1991) 1991 Okamoto and Sunabashiri (1992) 1992 Agui and Andreopoulos (1992) 1992 Szepessy and Bearman (1992) 1992 West (1993a, 1993b) 1993 Fox and Apelt (1993) 1993 Tanaka and Murata (1999) 1999 Kitagawa et al (1999) 1999 Park and Lee (2000) 2000 Park and Lee (2002) 2002 Roh and Park (2003) 2003 Leder (2003) 2003 Sumner et al (2004) 2004 Wang et al (2004) 2004 Pattenden et al (2005) 2005 Wang et al (2006) 2006 Adaramola et al (2006) 2006 Hain et al (2008) 2008 Becker et al (2008) 2008 Wang and Zhou (2009) 2009 Bourgeois et al (2011) 2011Hajimirzaie et al (2012 2012 Iungo et al (2012) 2012 Sattari et al (2012) 2012 Moreau and Doolan (2013) 2013 Hosseini et al (2013) 2013 Rostamy et al (2013) 2013 Uffinger et al (2013) 2013 a Sq. is the square cross section.…”

“…Conversely, in the midspan of the cylinder, where the effects of the tip and wall are reduced, the probability of antisymmetric shedding is higher. At aspect ratio below Bourgeois et al (2011Bourgeois et al ( , 2013 and Hosseini et al (2013) for the near wake of a square FWMC.…”

Boundary layer effect on the vortex shedding of wall-mounted rectangular cylinder

“…Both tip and base vortices were inherently associated with the free-end downwash and upwash flows, respectively. For similar oncoming boundary layers, Hosseini et al (2013) studied the effect of the boundary layer thickness on the flow topology downstream from a rectangular cylinder with an aspect ratio h/d = 8 (d = 12.7 mm). The authors evidenced the presence of dipole wake type for the natural boundary layer and a quadruple wake type with the tripped BL.…”

Effects of an upstream tetrahedron on the circular cylinder–flat plate juncture flow

“…Porteous et al and Hosseini et al mentioned that the ratio of boundary-layer thickness to the cylinder diameter was important to the behavior of the horseshoe vortices and flow-induced noise. Flow past the juncture of a rectangular prism has also been studied, for example, Martinuzzi and Tropea (1993), Seal et al (1995), Chou and Chao (2000), and Hosseini et al (2013). The characteristics of flow past wing-body junctures were reported by Smith and Gajjar (1984), , and Ölçmen and Simpson (1995).…”