| A structural subgrid-scale model for the collision-related statistics of inertial particles in large-eddy simulations of isotropic turbulent flows | |
Zhou ZD(周志登)1,2 ; Wang SZ(王士召)1,2; Yang XL(杨晓雷)1,2; Jin GD(晋国栋)1,2
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| Corresponding Author | Jin, Guodong([email protected]) |
| Source Publication | PHYSICS OF FLUIDS
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| 2020-09-01 | |
| Volume | 32Issue:9Pages:16 |
| ISSN | 1070-6631 |
| Abstract | In large-eddy simulations of particle-laden isotropic turbulent flows, the collision of inertial particles is strongly influenced by missing small-scale turbulence. In this paper, we apply the Kinematic Simulation with Approximate Deconvolution (KSAD) model to determine the contribution of small-scale turbulence to the motion of inertial particles and improve the prediction accuracy of the radial distribution function (RDF) and radial relative velocity (RRV), which are closely related to particle collisions. Different values of Stokes numbers (St), which are defined as the ratio of the particle response time to the Kolmogorov time scale, are considered. The KSAD model significantly improves the prediction accuracy of the RRV for all considered St. For the prediction of RDF, good agreement between the KSAD model and direct numerical simulations is only observed for large St, i.e., St >= 2.0. To explore the reason for the poor prediction of the KSAD model for small St, we compare the Eulerian statistics of the flow fields and the Lagrangian properties of the particles from different simulations and find the key reason is that the Gaussian turbulence generated in the kinematic simulation model is inadequate in recovering the vortex centrifugal effect of small-scale turbulence on the inertial particle clustering at small St. Published under license by AIP Publishing. |
| DOI | 10.1063/5.0018756 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000568838200003 |
| WOS Keyword | DIRECT NUMERICAL-SIMULATION ; SPACE-TIME CORRELATIONS ; PREFERENTIAL CONCENTRATION ; APPROXIMATE DECONVOLUTION ; HOMOGENEOUS TURBULENCE ; LAGRANGIAN STATISTICS ; SETTLING VELOCITY ; HEAVY-PARTICLES ; CLOUD DROPLETS ; DISPERSION |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; NSFC Program[11772337] ; Science Challenge Program[TZ2016001] ; National Key Project[GJXM92579] ; Chinese Academy of Sciences (CAS)[XDB22040104] ; CAS[QYZDJ-SSW-SYS002] ; CAS Center for Excellence in Complex System Mechanics |
| Funding Organization | NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; NSFC Program ; Science Challenge Program ; National Key Project ; Chinese Academy of Sciences (CAS) ; CAS ; CAS Center for Excellence in Complex System Mechanics |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Jin, Guodong |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/85208 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Zhou ZD,Wang SZ,Yang XL,et al. A structural subgrid-scale model for the collision-related statistics of inertial particles in large-eddy simulations of isotropic turbulent flows[J]. PHYSICS OF FLUIDS,2020,32,9,:16.Rp_Au:Jin, Guodong |
| APA | 周志登,王士召,杨晓雷,&晋国栋.(2020).A structural subgrid-scale model for the collision-related statistics of inertial particles in large-eddy simulations of isotropic turbulent flows.PHYSICS OF FLUIDS,32(9),16. |
| MLA | 周志登,et al."A structural subgrid-scale model for the collision-related statistics of inertial particles in large-eddy simulations of isotropic turbulent flows".PHYSICS OF FLUIDS 32.9(2020):16. |
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| Jp2020359.pdf（7280KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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