Comparison of Lattice Boltzmann Method and conventional CFD techniques based on a case study in a laneway of coal mine

Authors: Hui Liu*, Peking University , Shanjun Mao, Peking University, Mei Li, Peking University
Topics: China
Keywords: Lattice Boltzmann Method,CFD,airflow,dust dispersion,computational efficiency
Session Type: Paper
Day: 4/13/2018
Start / End Time: 5:20 PM / 7:00 PM
Room: Galvez, , Marriott, 5th Floor
Presentation File: No File Uploaded

The Lattice Boltzmann Method (LBM) has attracted significant interest in the CFD community. Ease of implementation, extensibility, and computational efficiency are the major reasons for LBM’s growing field of application and increasing popularity. In addition, the simplicity of the algorithm and its inherent locality make it amenable to massive parallelism. In this paper, the LBM is applied to investigate the temporospatial characteristics of airflow and dust dispersion in a real driving face in an excavation laneway of coal mine for the first time, and the parallelization of a standard LBM implementation is outlined. First, the computational domain and obstacles within it are discretized. Second, the LBM is utilized to investigate the dynamic regularity of airflow behavior and dust dispersion. Finally, its comprehensive comparison with traditional computational fluid dynamics(CFD) is presented in terms of accuracy, simulation time, turbulence modeling, numerical stability and simplicity of coding. Furthermore, simulation results from both conventional techniques and LBM are verified by field measurements, which demonstrates that the computational efficiency is significantly improved, and the LBM is especially useful for modeling complicated boundary conditions and multiphase interfaces. However, it also shows that what is gained in terms of algorithm simplicity is lost in terms of overall accuracy and various physical limitations.

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