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Turbulent clustering of point particles and finite-size particles in isotropic turbulent flows
Jin GD(晋国栋); Wang Y(王赟); Zhang J(张健); He GW(何国威); He, GW (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Source PublicationINDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
2013-08-21
Volume52Issue:33Pages:11294-11301
ISSN0888-5885
AbstractParticle clustering in turbulent flows is ubiquitous in particle-fluid two-phase flows in the riser of fast fluidized beds. Controlling the level of clustering is very crucial for improving the reactive efficiency in such flows. The present paper is devoted to numerically studying particle clustering in turbulent flows, where both point particles and finite-size particles are taken into account, respectively. A pseudospectral method with the particle tracking method is used to simulate the point particle clustering in the forced isotropic turbulent flows, while the lattice Boltzmann method is used to simulate the finite-size particles in decaying isotropic turbulent flows. It is observed that the mean drift velocity, caused by forces such as gravity, could reduce the level of particle clustering for point particles. However, the particle clustering is very weak for the particles of sizes larger than the characteristic viscous scales of turbulent flows, which is consistent with the previous experimental results. The observations suggest that the mean drift velocity and particle sizes can be used to control the level of particle clustering in chemical reactors.
KeywordParticle Clustering Point-particles Finite-size Particles Lattice Boltzmann Method Pseudo-spectral Method
Subject Area流体力学 ; 湍流 ; 多相流
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000323536000008
Funding OrganizationNSFC [11072247, 11021262, 11232011]; NSAF [U1230126]
DepartmentLNM湍流
Classification二类/Q2
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47459
Collection非线性力学国家重点实验室
Corresponding AuthorHe, GW (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Jin GD,Wang Y,Zhang J,et al. Turbulent clustering of point particles and finite-size particles in isotropic turbulent flows[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2013,52(33):11294-11301.
APA Jin GD,Wang Y,Zhang J,He GW,&He, GW .(2013).Turbulent clustering of point particles and finite-size particles in isotropic turbulent flows.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,52(33),11294-11301.
MLA Jin GD,et al."Turbulent clustering of point particles and finite-size particles in isotropic turbulent flows".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 52.33(2013):11294-11301.
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