Numerical simulation of flow past a square cylinder with a circular bar upstream and a splitter plate downstream

作     者：Yuan Ma MMRashidi Zhi-gang Yang 

作者机构：Shanghai Automotive Wind Tunnel CenterTongji UniversityShanghai 201804China Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management SystemsShanghai 201804China Department o f Civil EngineeringSchool of EngineeringUniversity of BirminghamBirminghamUK 

出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)

年 卷 期：2019年第31卷第5期

页      面：949-964页

核心收录：

学科分类：08[工学] 080103[工学-流体力学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Project supported by the Shanghai Automotive Wind Tunnel Technical Service Platform 

主　　题：Square cylinder lattice Boltzmann method(LBM) reduction of drag forces vortex shedding control circular bar splitter plate 

摘      要：A numerical investigation of flow past a square cylinder with a circular bar upstream and a splitter plate downstream is carried out in this paper by lattice Boltzmann method(LBM).The combination of the three obstacles and LBM is the main novelty of the present study.The flow patterns are analyzed by a uniform flow of Reynolds number 100 based on the side length of the square cylinder,D.Numerical simulations are performed in the range of 1≤Ds/D≤5,0≤G/D≤7 and 1≤L/D≤6,where Ds,G and L are the center-to center distance,surface-to-surface distance and the splitter plate length,respectively.Six flow patterns are observed in the present study.The maximum percentage reduction in mean drag coefficient is 68.76%at(ds,g,l)=(2.5,0,3)which is in pattern VI.The vortex shedding from the square cylinder and the circular bar can be completely suppressed in pattern VI.The small distance between the square cylinder and the splitter plate plays a more vital role in suppression of vortex shedding as compared with large distance and length.