脉动风场中的飘雪模拟  

Falling Snow Simulation in Fluctuation Wind Field

作　　者：张洪礼[1] 吕梦雅[1] 李洪亭[1] 唐勇[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004

出　　处：《小型微型计算机系统》2011年第5期964-967,共4页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60970073)资助

摘　　要：飘雪场景的模拟可以大大提高虚拟场景的逼真效果,其中风场的建模是重要的环节.为更真实的表现风的随机性,本文基于格子BGK建立风场,用D3Q7模型改进三维风场的建模方法,引入湍流强度的概念描述风场的湍流程度,根据地表面的粗糙程度和离地高度确定其大小,实验表明该方法能更好的增强模拟风场中飘雪场景的真实性.The simulation of the falling snow could greatly improve the realism of the virtual scene.The modeling for the wind field is a most important part.To perform the random of the wind more veridically,in this article,we build the wind field based on the lattice BGK,and improve the modeling for the three-dimensional wind field with the D3Q7 model.We introduce the turbulence intensity to describe the turbulent of the wind field,and determine its size by the height and the roughness on the terrain surface.The experiments demonstrate that our method can meet the needs of the authenticity of the floating snow simulation much better.

关 键 词：飘雪场景 风场建模 格子BGK模型 湍流强度 地面粗糙度 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]