Lattice Boltzmann simulations of oscillating-grid turbulence

• Published in: Journal of hydrodynamics. Series B Vol. 29; no. 1; pp. 68 - 74
• Main Author: 张金风 张庆河 Jerome P.-Y. Maa 乔光全
• Format: Journal Article
• Language: English; Chinese
• Published: Singapore Elsevier Ltd 01.02.2017; Springer Singapore; Fourth Harbor Engineering Investigation and Design Institute, Co., Ltd., China Communications Construction Company, Guangzhou 510230, China
• Subjects: Engineering; Engineering Fluid Dynamics; Hydrology/Water Resources; lattice Boltzmann method; mean flow; Numerical and Computational Physics; Oscillating grid; quasi-isotropic homogenous turbulence; Simulation; 准各向同性; 数值模拟; 格子Boltzmann方法; 格子玻尔兹曼方法; 湍流特性; 直接模拟法; 空间变异; 网格湍流; Oscillating grid; lattice Boltzmann method; quasi-isotropic homogenous turbulence; mean flow
• ISSN: 1001-6058; 1878-0342
• DOI: 10.1016/S1001-6058(16)60718-7

The lattice Boltzmann method is used to simulate the oscillating-grid turbulence directly with the aim to reproduce the experimental results obtained in laboratory. The numerical results compare relatively well with the experimental data through determining the spatial variation of the turbulence characteristics at a distance from the grid. It is shown that the turbulence produced is homogenous quasi-isotropic in case of the negligible mean flow and the absence of secondary circulations near the grid. The direct numerical simulation of the oscillating-grid turbulence based on the lattice Boltzmann method is validated and serves as the foundation for the direct simulation of particle-turbulence interactions.