title: Effects of wall suction/blowing on two-dimensional flow past a confined square cylinder.
abstract: A numerical simulation is conducted to study the laminar flow past a square cylinder confined in a channel (the ratio of side length of the square to channel width is fixed at 1/4) subjected to a locally uniform blowing/suction speed placed at the top and bottom channel walls. Governing equations with boundary conditions are resolved using a finite volume method in pressure-velocity formulation. The flow patterns relevant to the critical spacing values are investigated. Numerical results show that wall blowing has a stabilizing effect on the flow, and the corresponding critical Reynolds number increases monotonically with increasing blowing velocity. Remarkably, steady asymmetric solutions and hysteretic mode transitions exist in a certain range of parameters (Reynolds number and suction speed) in the case of suction.
authors.affiliation: School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, 621010 Sichuan People's Republic of China ; Department of Modern Mechanics, University of Science and Technology of China, Hefei, 230027 Anhui People's Republic of China.
authors.forename: Wei
authors.identifier: 0000-0002-9960-9806
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Mathematics, Southwest University of Science and Technology, Mianyang, 621010 Sichuan People's Republic of China.
authors.forename: Yanqun
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, 621010 Sichuan People's Republic of China.
authors.forename: Lang
authors.initials: L
authors.lastname: Li
authors.affiliation: School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, 621010 Sichuan People's Republic of China.
authors.forename: Guoping
authors.initials: G
authors.lastname: Chen
keywords: Bifurcation; Blowing; Channel; Square cylinder; Suction