A large‐eddy simulation tool is developed for simulating the dynamics of atmospheric boundary layers (ABLs) using lattice Boltzmann method (LBM), which is an alternative approach for computational fluid dynamics and proved to be very well suited for the simulation of low‐Mach flows. The equations of motion are coupled with the global complex physical models considering the coupling among several mechanisms, namely basic hydro‐thermodynamics and body forces related to stratification, Coriolis force, canopy effects, humidity transport, and condensation. Mass and momentum equations are recovered by an efficient streaming, collision, and forcing process within the framework of LBM while the governing equations of temperature, liquid, and vapor water fraction are solved using a finite volume method. The implementation of wall models for ABL, subgrid models, and interaction terms related to multiphysic phenomena (e.g., stratification, condensation) is described, implemented, and assessed in this study. An immersed boundary approach is used to handle flows in complex configurations, with application to flows in realistic urban areas. Applications to both wind engineering and atmospheric pollutant dispersion are illustrated.

中文翻译：

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ProLB：大气边界层流大涡模拟的格子玻尔兹曼求解器

开发了一个大型涡流仿真工具，用于使用格子Boltzmann方法（LBM）来模拟大气边界层（ABL）的动力学，这是计算流体动力学的另一种方法，被证明非常适合于低马赫数的仿真流。考虑到几种机制之间的耦合，运动方程与整体复杂的物理模型耦合，即基本的水热力学和与分层相关的体力，科里奥利力，冠层效应，湿度传输和凝结。通过在LBM框架内进行有效的流动，碰撞和强迫过程，可以恢复质量和动量方程，同时使用有限体积法求解温度，液体和蒸气水分数的控制方程。ABL墙模型的实现，本研究描述，实施和评估了与多种物理现象（例如分层，凝结）有关的亚网格模型和相互作用项。沉浸边界方法用于处理复杂配置中的流量，并应用于现实市区中的流量。举例说明了在风能工程和大气污染物扩散中的应用。