Inertial focusing and rotating characteristics of elliptical and rectangular particle pairs in channel flow

doi:10.1088/1674-1056/ac5983

中国物理B ›› 2022, Vol. 31 ›› Issue (8): 80501-080501.doi: 10.1088/1674-1056/ac5983

Inertial focusing and rotating characteristics of elliptical and rectangular particle pairs in channel flow

Pei-Feng Lin(林培锋)¹, Xiao Hu(胡箫)^1,2,†, and Jian-Zhong Lin(林建忠)²

1 Key Laboratory of Fluid Transmission Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China;
2 Department of Mechanics, State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China

收稿日期:2022-01-11 修回日期:2022-02-13 接受日期:2022-03-02 出版日期:2022-07-18 发布日期:2022-07-29
通讯作者: Xiao Hu E-mail:huxiao0329@163.com
基金资助:
Project supported by the Major Program of the National Natural Science Foundation of China (Grant No. 12132015), the Natural Science Foundation of Zhejiang Province, China (Grant No. LQ22A020008), and the Key Research and Development Program of Zhejiang Province, China (Grant No. 2020C03081).

Inertial focusing and rotating characteristics of elliptical and rectangular particle pairs in channel flow

Pei-Feng Lin(林培锋)¹, Xiao Hu(胡箫)^1,2,†, and Jian-Zhong Lin(林建忠)²

1 Key Laboratory of Fluid Transmission Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China;
2 Department of Mechanics, State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China

Received:2022-01-11 Revised:2022-02-13 Accepted:2022-03-02 Online:2022-07-18 Published:2022-07-29
Contact: Xiao Hu E-mail:huxiao0329@163.com
Supported by:
Project supported by the Major Program of the National Natural Science Foundation of China (Grant No. 12132015), the Natural Science Foundation of Zhejiang Province, China (Grant No. LQ22A020008), and the Key Research and Development Program of Zhejiang Province, China (Grant No. 2020C03081).

摘要/Abstract

摘要： The lattice Boltzmann method is used to study the inertial focusing and rotating characteristics of two-dimensional elliptical particles and rectangular particles in channel flow. The results show that both elliptical particles and rectangular particles initially located on one side and two sides of channel centerline migrate first towards the equilibrium position. Then, the single-line particle train with an increasing spacing and the staggered particle train with stable spacing are formed. The axial spacing of the staggered particle pair increases with aspect ratio and Reynolds number increasing. The staggered elliptical or rectangular particle pairs form perpendicular orientation angles, which will be more obvious at larger aspect ratio and lower Reynolds number. The single-line particle trains with different shapes seldom form the perpendicular orientation angle.

关键词: lattice Boltzmann method, particle trains self-organization, inertial migration, particle shape

Abstract: The lattice Boltzmann method is used to study the inertial focusing and rotating characteristics of two-dimensional elliptical particles and rectangular particles in channel flow. The results show that both elliptical particles and rectangular particles initially located on one side and two sides of channel centerline migrate first towards the equilibrium position. Then, the single-line particle train with an increasing spacing and the staggered particle train with stable spacing are formed. The axial spacing of the staggered particle pair increases with aspect ratio and Reynolds number increasing. The staggered elliptical or rectangular particle pairs form perpendicular orientation angles, which will be more obvious at larger aspect ratio and lower Reynolds number. The single-line particle trains with different shapes seldom form the perpendicular orientation angle.

Key words: lattice Boltzmann method, particle trains self-organization, inertial migration, particle shape

中图分类号: (Kinetic theory)

05.20.Dd

05.65.+b (Self-organized systems) 47.11.Qr (Lattice gas) 47.57.E- (Suspensions)

Pei-Feng Lin(林培锋), Xiao Hu(胡箫), and Jian-Zhong Lin(林建忠). Inertial focusing and rotating characteristics of elliptical and rectangular particle pairs in channel flow[J]. 中国物理B, 2022, 31(8): 80501-080501.

Pei-Feng Lin(林培锋), Xiao Hu(胡箫), and Jian-Zhong Lin(林建忠). Inertial focusing and rotating characteristics of elliptical and rectangular particle pairs in channel flow[J]. Chin. Phys. B, 2022, 31(8): 80501-080501.

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Inertial focusing and rotating characteristics of elliptical and rectangular particle pairs in channel flow

Inertial focusing and rotating characteristics of elliptical and rectangular particle pairs in channel flow

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