基于涡丝模型的烟雾仿真研究  

The Research of Smoke Simulation Based on Vortex Filament Method

作　　者：陈国栋[1] 苏志鹏 王娜[2] CHEN Guodong;SU Zhipeng;WANG Na(College of Physics and Information Engineering,FuzhouUniversity,Fuzhou 350116,China;Fuqing Campus of Fujian Normal University,fuqing 350300,China)

机构地区：[1]福州大学物理与信息工程学院,福建福州350116 [2]福建师范大学福清分校,福建福清350300

出　　处：《贵州大学学报（自然科学版）》2018年第1期57-62,共6页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金项目资助(61471124);福建省自然科学基金项目资助(2013J05090)

摘　　要：烟雾仿真是近年来计算机图形学应用的热点研究方向,传统的烟雾仿真方法大致有:基于粒子系统的方法,基于网格的欧拉法,基于无网格的拉格朗日方法以及两者的混合。本文为逼真的仿真烟雾使用了基于涡丝和涡环的方法,相比于传统的使用基于网格的欧拉法和无网格的拉格朗日方法,本文的方法将流场描述为不断生成、运动、缠绕的涡丝和涡环。通过谐波分析建立涡丝模型避免了在涡丝伸展过程中出现采样不足的情况,从涡旋场到速度场的转换通过毕奥萨伐尔定律完成,通过实验该方法在仿真轻薄烟雾时效果较好,同时可以达到对烟雾较好的控制,烟雾渲染的速度较快,时间稳定性好。Smoke simulation is a hot research direction of computer graphics applications in recent years,the traditional smoke simulation method can roughly be classified into:the method based on particle system,euler's method based on grid,based on the Lagrange meshless methods,and a mixture of both.This is a realistic simulation of smoke based on vortex filament was used and the method of vortex ring,compared with the traditional use based on grid of euler method and Lagrange meshless method,the method described flow field is generated continuously,sports,vortex filament winding and vortex ring.By harmonic analysis of vortex filament model is established to avoid the sampling is insufficient in the process of vortex filament stretching,conversion from the vortex field to the velocity field by biotsavart law,through the experiment of the method in the simulation effect is better when the light smoke,at the same time can achieve better control of smoke,smoke rendering speed faster,time stability is good.

关 键 词：涡丝 谐波分析 Biot-Savart定律 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]