Particle flow simulations with homogenised lattice Boltzmann methods
Particle flow simulations with homogenised lattice Boltzmann methods
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DOI：
10.1016/j.partic.2016.11.001
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发表时间：
2017-10-01
期刊：
影响因子：
3.5
通讯作者：
Nirschl, Hermann
中科院分区：
文献类型：
--
作者：
Krause, Mathias J.;Klemens, Fabian;Nirschl, Hermann
提出了一种模拟二维粘性流体中任意形状粒子的方法，该方法通过调整标准格子Boltzmann方法（LBM）平衡分布函数的速度参数来实现。通过实例仿真与文献结果的比较，验证了该方法的有效性和收敛性。在拉德的方法中发生的压力波动大大减少。与浸入边界法相比，这种方法不需要成本密集的插值。保持了LBM的并行效率。在粒子-粒子碰撞过程中观察到一种内在的动量转移。为了证明该方法的能力，尽管省略了明确的粒子碰撞模型，几种形状的粒子的沉降进行了模拟。(C)2017中国科学院颗粒学会、过程工程研究所。Elsevier B. V.出版，保留所有权利。
An alternative approach to simulating arbitrarily shaped particles submersed in viscous fluid in two dimensions is proposed, obtained by adapting the velocity parameter of the equilibrium distribution function of a standard lattice Boltzmann method (LBM). Comparisons of exemplifying simulations to results in the literature validate the approach as well as the convergence analysis. Pressure fluctuations occurring in Ladd's approach are greatly reduced. In comparison with the immersed boundary method, this approach does not require cost intensive interpolations. The parallel efficiency of LBM is retained. An intrinsic momentum transfer is observed during particle particle collisions. To demonstrate the capabilities of the approach, sedimentation of particles of several shapes is simulated despite omitting an explicit particle collision model. (C) 2017 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.