A Lagrangian model for turbulent dispersion with turbulent-like flow structure: Comparison with direct numerical simulation for two-particle statistics

被引：74
|
作者：
Malik, NA [1 ]
Vassilicos, JC
机构：
[1] Univ Cambridge, Dept Appl Math & Theoret Phys, Silver St, Cambridge CB3 9EW, England
[2] Hong Kong Univ Sci & Technol, Dept Math, Kowloon, Peoples R China
来源：
PHYSICS OF FLUIDS | 1999年 / 11卷 / 06期
关键词：
D O I：
10.1063/1.870019
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A wide range of relative two-particle dispersion statistics from the Lagrangian Kinematic Simulation (KS) model, which contains turbulent-like flow structures, compares well with Yeung's [Phys. Fluids 6, 3416 (1994)] DNS results. In particular, the Lagrangian flatness factor mu(4)(t) compares excellently (better than Heppe's [J. Fluid Mech. 357, 167 (1998)] nonlinear stochastic model). For higher Reynolds numbers the results from KS show that mu(4)(t) is significantly greater than 3 over a wide range of times within the inertial range of time scales. (C) 1999 American Institute of Physics. [S1070-6631(99)02706-3].
引用
收藏
页码：1572 / 1580
页数：9
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