文献类型：期刊文献

英文题名：Study of Liquid Viscosity Effects on Hydrodynamic Forces on an Oscillating Circular Cylinder Underwater Using OpenFOAM

作者：Mao, Hongfei[1,2];He, Yanli[1];Wu, Guanglin[1];Lin, Jinbo[1];Ji, Ran[1]

机构：[1]Guangdong Ocean Univ, Coll Ocean Engn, Zhanjiang 524088, Peoples R China;[2]Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China

年份：2021

卷号：13

期号：10

外文期刊名：SYMMETRY-BASEL

收录：SCI-EXPANDED(收录号：WOS:000717107700001)、、Scopus(收录号：2-s2.0-85116089266)、WOS

基金：This study is supported financially by the National Natural Science Foundation of China (Granted No. 52001071, 52071090); the Youth Innovative Talent Project of the Guangdong Education Bureau (Granted No. 2019KQNCX045); the Doctor Initiate Projects of Guangdong Ocean University (Granted No. 120602-R19024); the Special Projects in Key Areas of Guangdong Education Bureau (Granted No. 2019KZDZX1024).

语种：英文

外文关键词：liquid viscosity; oscillating circular cylinder; hydrodynamic forces; viscous effects; OpenFOAM

外文摘要：By neglecting the viscosity of fluid and rotation in flow, the theory of potential flow cannot accurately predict the hydrodynamic forces on the structures under significant viscous effects. In this study, the effects of liquid viscosity on the hydrodynamic forces on a horizontal circular cylinder underwater with a large-amplitude forced oscillation were investigated. The study used a two-dimensional two-phase flow wave tank model based on the viscous fluid theory using the OpenFOAM package. The numerical calculations were carried out under different types of liquid (i.e., liquid with different viscosities). The liquid viscosity effects are visually shown by comparison of the various frequency components of the hydrodynamic forces on the cylinder, and the magnitude and phase relations of the viscous shear forces and the pressure forces. By analyzing the distribution characteristics of the flow fields around the circular cylinder, the viscous-effect mechanisms are revealed. It is found that the discrepancies of the contributions of viscous shear forces, and the discrepancies of the vortex effects on the phase and magnitude of the pressure forces lead to the obvious differences among the results under different liquid viscosities.