The formation mechanism of recirculating wake for steady flow through and around arrays of cylinders

Tang, Tingting1; Yu, Peng1; Shan, Xiaowen1; Chen, Huisu2

2019-04

10.1063/1.5090817

PHYSICS OF FLUIDS   影响因子和分区

1070-6631

1089-7666

The mechanism of recirculating wake formation was examined based on a series of numerical experiments on steady flow through and around periodic square arrays of evenly spaced circular cylinders. The Reynolds number of the array Re ranged from 1 to 50, and the solid fraction of the array 0 was varied from 9.69 z 10-11 to 0.785. The recirculating wake was found to be completely detached from the array under a certain range of 0 and Re, and varied in size with 0 and Re. The trailing edge bleeding from the array affects the vortex formation in a way consistent with the entrainment detrainment mechanism. The combination effect of vorticity accumulation and decay also gives rise to the dissipative vortex. By examining the shear layer formed by the bleeding flow and outer flow, which varies with Re and 0, it is concluded that the recirculation mainly results from flow separation at the junction point between the shear layer and the extended centerline of the array due to an adverse pressure gradient. Published under license by AIP Publishing.

SCI ; EI

英语

第一 ; 通讯

Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (second phase)[U1501501]

Mechanics ; Physics

Mechanics ; Physics, Fluids & Plasmas

WOS:000466701800037

AMER INST PHYSICS

20191906897015

Circular cylinders ; Flow separation ; Reynolds number ; Steady flow ; Vortex flow ; Wakes

Fluid Flow:631 ; Fluid Flow, General:631.1

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China
2.Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Construct Mat, Nanjing 210018, Peoples R China

Tang, Tingting,Yu, Peng,Shan, Xiaowen,et al. The formation mechanism of recirculating wake for steady flow through and around arrays of cylinders[J]. PHYSICS OF FLUIDS,2019,31(4).

Tang, Tingting,Yu, Peng,Shan, Xiaowen,&Chen, Huisu.(2019).The formation mechanism of recirculating wake for steady flow through and around arrays of cylinders.PHYSICS OF FLUIDS,31(4).

Tang, Tingting,et al."The formation mechanism of recirculating wake for steady flow through and around arrays of cylinders".PHYSICS OF FLUIDS 31.4(2019).