| 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.
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| Source Publication | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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| 2013-08-21 | |
| Volume | 52Issue:33Pages:11294-11301 |
| ISSN | 0888-5885 |
| Abstract | Particle 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. |
| Keyword | Particle Clustering Point-particles Finite-size Particles Lattice Boltzmann Method Pseudo-spectral Method |
| Subject Area | 流体力学 ; 湍流 ; 多相流 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000323536000008 |
| Funding Organization | NSFC [11072247, 11021262, 11232011]; NSAF [U1230126] |
| Department | LNM湍流 |
| Classification | 二类/Q2 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/47459 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | He, 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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