Numerical simulation of viscous flow past an oscillating square cylinder using a CIP-based model

• Published in: Journal of hydrodynamics. Series B Vol. 29; no. 1; pp. 96 - 108
• Main Author: 付英男 赵西增 曹飞凤 张大可 程都 李莉
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 01.02.2017; Springer Singapore
• Subjects: CFD模型; CIP method; CIP法; Engineering; Engineering Fluid Dynamics; Flow past cylinder; Hydrology/Water Resources; immersed boundary method; lock-on; Numerical and Computational Physics; oscillating square cylinder; Simulation; 振荡流; 数值模拟; 方柱; 流体-结构相互作用; 粘性流动; 纳维-斯托克斯方程; CIP method; immersed boundary method; oscillating square cylinder; lock-on; Flow past cylinder
• DOI: 10.1016/S1001-6058(16)60721-7
• ISSN: 1001-6058

The flow past an in-line forced oscillating square cylinder at Reynolds number of 200 is studied using an in-house code, named constrained interpolation profile method developed in Zhejiang University (CIP-ZJU). The model is established in the Cartesian coordinate system using the CIP method to discretise the Navier-Stokes equations. The fluid-structure interaction is treated as a multiphase flow of the liquid and solid phases to be solved simultaneously. An immersed boundary method is used to deal with the boundary of the solid body. The CFD model is first applied to the computation of the flow past a fixed square cylinder for its validation. Computations are then performed for the flow past a square cylinder oscillating in the streamwise direction. Considerable attention is paid to the symmetric and anti-symmetric modes of the vortex shedding in the oscillating square cylinder wake. Various oscillation amplitudes and frequencies are simulated and their effects on the vortex shedding modes are analyzed via Lissajous patterns of the unsteady lift coefficient. The relationship among the lift coefficient, the drag coefficient and the lock-on range is also investigated quantitatively.