Influences of suction and blowing on vortex shedding behind a square cylinder in a channel

Effects of wall suction/blowing on two-dimensional flow past a confined square cylinder

“…Suction/blowing method, one of the most effective active flow-control methods, has been widely used in many aspects, such as bluff body (Mathelin and Maitre 2009 ; Weller et al 2009 ; Zheng and Zhang 2012 ; Shtendel and Seifert 2014 ; Chen et al 2013 ; Muralidharan et al 2013 ; Boujo and Gallaire 2014 ; Sohankar et al 2015 ; Layek et al 2008a ), backward-facing step (Kaiktsis and Monkewitz 2003 ), symmetric sudden expanded channel (Layek et al 2008b ), and plane Poiseuille flow (Gao and Lu 2006 ). In recent years, several researchers have studied the effect of suction/blowing on flow past the bluff body.…”

“…Therefore, suction/blowing positioned on channel walls is an appropriate control method for the flow past a confined square cylinder. To the best of our knowledge, this method has been examined only in the work of Layek et al ( 2008a , b ), where vortex shedding is argued to be suppressed with the application of local blowing or suction. However, Layek et al ( 2008a , b ) only considered the flow control for two typical suction/blowing speeds at a fixed Reynolds number (Re = 600).…”

“…To the best of our knowledge, this method has been examined only in the work of Layek et al ( 2008a , b ), where vortex shedding is argued to be suppressed with the application of local blowing or suction. However, Layek et al ( 2008a , b ) only considered the flow control for two typical suction/blowing speeds at a fixed Reynolds number (Re = 600). Therefore, the main objective of the present study is to investigate the effects of wall suction or blowing on the wake of a symmetrically confined square cylinder for a wide range of parameters.…”

Computational Fluid Dynamics study on the performance and mechanism of suction control over a high‐rise building

“…Suction, as originally proposed by Prandtl, was actually the first method used for the separation control and drag‐reduction of a cylinder column (Schlichting and Gersten, 2000). In recent years, it has been widely used in many aspects, such as to improve the aerodynamic characteristics of the airfoils (Huang et al , 2004) or the compressor cascade (Song et al , 2005), to control the flow separation over the backward‐facing step flow (Uruba et al , 2007), to control the vortex shedding of the square cylinder in the channel (Layek et al , 2008), and to reduce the wind loads on high‐rise buildings (Zheng and Zhang, 2010).…”