粒子系统在复杂风场及湍流场中的实现  

Implement of particle system in complex wind field and turbulence field

作　　者：肖凯涛[1] 徐路程 李红辉[2] 

机构地区：[1]防化研究院,北京102205 [2]北京交通大学计算机与信息技术学院,北京100044

出　　处：《北京交通大学学报》2015年第2期13-21,共9页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：总装备部"十二五"装备预先研究课题项目资助(40407020502)

摘　　要：为真实地模拟气溶胶在复杂风场中的输运扩散效果,提出一种将计算流体力学计算的风场结果与粒子系统相结合的方法.以一个存在障碍物的三维区域为例,采用非结构四面体网格对其进行网格划分,运用计算流体力学方法对这一区域的风场和湍流场进行求解;在仿真平台Unity 3D中建立了与计算模型对应的环境模型,并将风场和湍流场的计算结果导入环境模型中,实现了风场在虚拟环境中的可视化.在环境模型中建立了粒子系统,并在存储于非结构网格中的风场及湍流场的作用下模拟了粒子系统的运动变换,实现了虚拟环境中复杂风场、湍流场条件下的气溶胶的扩散仿真.A method that combined the wind field results calculated by computational fluid dynamics and particle system is proposed in order to simulate the transport and diffusion of aerosol in complex wind field. Using a three-dimensional （3D） domain with an obstacle as an example, the domain is meshed by tetrahedral unstructed grids, the wind field and turbulence field in this domain are calculat- ed by employing computational fluid dynamics. An environmental model corresponding to calculation model is built in simulation platform-Unity 3D. The calculated wind field and turbulence field are im- ported into the environmental model, and visualization of wind field in virtual environment is realized. A particle system is built in the environmental model. The motion transformation of the particle system is simulated under the function of the wind field and turbulence field stored in unstructed grids. The aerosol diffusion simulation under complex wind field and turbulence field is achieved in virtual envi- ronment.

关 键 词：UNITY 3D 计算流体力学 风场 湍流场 粒子系统 非结构网格 

分 类 号：TP399[自动化与计算机技术—计算机应用技术] O35[自动化与计算机技术—计算机科学与技术]