Rotational Oscillation Effect on Flow Characteristics of a Circular Cylinder at Low Reynolds Number

作     者：Alice Rosa da Silva Aristeu da Silveira-Neto Antonio Marcos Goncalves de Lima 

作者机构：School of Civil EngineeringFederal University of UberlandiaUberlandiaBrazil School of Mechanical EngineeringFederal University of UberlandiaBrazil 

出 版 物：《World Journal of Mechanics》 (力学国际期刊（英文）)

年 卷 期：2015年第5卷第10期

页      面：195-209页

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Rotationally Oscillating Cylinder Vortex Shedding Modes Drag Coefficient 

摘      要：Two dimensional numerical simulations of flow around a rotationally oscillating circular cylinder were performed at Re = 1000. A wide range of forcing frequencies, fr, and three values of oscillation amplitudes, A, are considered. Different vortex shedding modes are observed for a fixed A at several values of fr, as well as for a fixed fr at different values of A. The 2C mode of vortex shedding was obtained in the present study. It is important to point out that this mode has not been observed by other investigators for rotationally oscillating case. Also, it is verified that this mechanism has great influence on the drag coefficient for high frequency values. Furthermore, the lift and pressure coefficients and the power spectra density are also analyzed.