Direct simulations of aggregates in homogeneous isotropic turbulence

被引：0
|
作者：
J. J. Derksen
机构：
[1] University of Alberta,Chemical and Materials Engineering
来源：
Acta Mechanica | 2013年 / 224卷
关键词：
Fractal Dimension; Direct Numerical Simulation; Primary Particle; Aggregate Size; Isotropic Turbulence;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We study aggregation in turbulent flow by means of particle-resolved, direct numerical simulations. Mono-sized spheres with an attractive square-well potential are released in homogeneous, isotropic turbulence generated through linear forcing. Typical cases have a solids volume fraction of 0.08 and a ratio of the Kolmogorov scale over the primary sphere radius of O(0.1). The latter implies that the flow around the primary spheres is inhomogeneous. The simulations show the continuous formation and breakage of aggregates as a result of the turbulence and the attractive potential. The average size of the aggregates is a pronounced function of the strengths of turbulence and interaction potential. Fractal dimensions of the aggregates are in the range 1.4–1.8 for the cases studied.
引用
收藏
页码：2415 / 2424
页数：9
相关论文
共 50 条
  • [41] Modeling homogeneous ignition processes of clustering solid particle clouds in isotropic turbulence
    Farmand, Pooria
    Nicolai, Hendrik
    Usman, Muhammad
    Berger, Lukas
    Attili, Antonio
    Gauding, Michael
    Hasse, Christian
    Pitsch, Heinz
    FUEL, 2024, 371
  • [42] Bubble generated turbulence and direct numerical simulations Bubble generated turbulence and direct numerical simulations
    Joshi, Jyeshtharaj B.
    Nandakumar, K.
    Evans, Geoffrey M.
    Pareek, Vishnu K.
    Gumulya, Monica M.
    Sathe, Mayur J.
    Khanwale, Makrand A.
    CHEMICAL ENGINEERING SCIENCE, 2017, 157 : 26 - 75
  • [43] Temperature statistics in particle-laden homogeneous isotropic turbulence
    He, Z
    Liu, ZH
    MULTIPHASE, NON-NEWTONIAN AND REACTING FLOWS, VOL 2, PROCEEDINGS, 2004, : 77 - 81
  • [44] Scale invariance in finite Reynolds number homogeneous isotropic turbulence
    Djenidi, L.
    Antonia, R. A.
    Tang, S. L.
    JOURNAL OF FLUID MECHANICS, 2019, 864 : 244 - 272
  • [45] Higher-order dissipation in the theory of homogeneous isotropic turbulence
    Peters, Norbert
    Boschung, Jonas
    Gauding, Michael
    Goebbert, Jens Henrik
    Hill, Reginald J.
    Pitsch, Heinz
    JOURNAL OF FLUID MECHANICS, 2016, 803 : 250 - 274
  • [46] The role of bulk viscosity on the decay of compressible, homogeneous, isotropic turbulence
    Pan, Shaowu
    Johnsen, Eric
    JOURNAL OF FLUID MECHANICS, 2017, 833 : 717 - 744
  • [47] Inertial particle relative velocity statistics in homogeneous isotropic turbulence
    Salazar, Juan P. L. C.
    Collins, Lance R.
    JOURNAL OF FLUID MECHANICS, 2012, 696 : 45 - 66
  • [48] Lagrangian cascade in three-dimensional homogeneous and isotropic turbulence
    Huang, Yongxiang
    Schmitt, Francois G.
    JOURNAL OF FLUID MECHANICS, 2014, 741 : R21 - R211
  • [49] Triple decomposition of velocity gradient tensor in homogeneous isotropic turbulence
    Nagata, Ryosuke
    Watanabe, Tomoaki
    Nagata, Koji
    da Silva, Carlos B.
    COMPUTERS & FLUIDS, 2020, 198
  • [50] Direct numerical simulation study of the interaction between the polymer effect and velocity gradient tensor in decaying homogeneous isotropic turbulence
    蔡伟华
    李凤臣
    张红娜
    Chinese Physics B, 2011, 20 (12) : 283 - 296
12345