Bursting Phenomenon of Turbulent Boundary Layers with Injection and Suction through a Slit

Effects of blowing through a porous strip in a turbulent channel flow

“…At x/b < 20, the reduction in C f is about 20% with the highest blowing rate r = 0.58. The decrease of the skin friction with blowing was also obtained in the steady forcing case by Sano and Hirayama [2] and Park and Choi [3] and in the periodic blowing case by Tardu [8]. Fig.…”

“…It is known that blowing and suction change several aspects of the flow. Uniform blowing from the wall decreases the skin friction and increases the strength of the fluctuating quantities, while uniform suction has an opposite effect [2][3][4][5][6][7].…”

“…Sano and Hirayama [2] performed an experimental study to determine the effects of localized steady blowing or suction through a slit in a turbulent boundary layer. They found that suction decreases the shape parameter while the opposite occurs with blowing.…”

Turbulent passive scalar transport under localized blowing

“…However, the characterization of the severity of local blowing/suction by strips is not straightforward and B f is not suitable for describing the flow characteristics past the local intervention, as clearly shown by Sano and Hirayama (1985) and Sokolov and Antonia (1993). Indeed, the local suction/blowing involves phenomena related to the relaxation of near wall turbulence downstream of the intervention zone.…”

“…The role of blowing is opposite. There has been an increasing interest in studying the effect of local (steady) suction through spanwise slots in recent years (Sokolov and Antonia, 1993;Sano and Hirayama, 1985). These studies are quite detailed, including the effect on the fine structure of the near wall turbulence, the distribution in the quadrants, the bursting activity etc.…”