一种实现流固实时交互的改进方法  

Improved Method for Realizing Fluid-solid Real-time Interaction

作　　者：唐勇[1,2] 高虎 郭慧玲 赵静[1,2] 刘浩阳 TANG Yong;GAO Hu;GUO Hui-ling;ZHAO Jing;LIU Hao-yang(College of Information Science and Engineering,Yanshan University,Qinhuangdao 066004,China;Key Laboratory for Computer Virtual Technology and System Integration of Hebei Probince,Qinhuangdao 066004,China;Department of Information Engineering,Hebei University of Environmental Engineering,Qinhuangdao 066102,China)

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004 [2]河北省计算机虚拟技术与系统集成重点实验室,河北秦皇岛066004 [3]河北环境工程学院信息工程系,河北秦皇岛066102

出　　处：《小型微型计算机系统》2019年第11期2456-2460,共5页Journal of Chinese Computer Systems

基　　金：河北省自然科学基金项目(F2018203060)资助

摘　　要：为了解决流体运动缺乏层次感和流固交互中的不实时、真实感弱的问题,对传统基于拉格朗日的方法进行改进.首先,针对拉格朗日方法流体模拟中粒子运动单一性的问题,引入柏林噪声函数,增强流体运动的层次感;其次,采用对存储需求较小的蛙跳时间积分法,加快流体粒子运动状态的计算速度,从而提高流固交互模拟效率;然后,通过在固体边界施加一层反作用力区域,对进入该区域的流体粒子进行反作用,有效减小流体粒子穿透固体边界的可能性;最后,为了避免流固交互时粒子发生不合理弹性碰撞而影响交互真实性,引入恢复系数控制碰撞后的粒子动能,使交互更真实自然.设计多组流体运动及流固交互对比实验,实验结果表明,本文提出的方法能够真实有效地模拟不同状态的流体,并且能很好地模拟出流固实时交互效果.In fluid-solid interaction simulation,in order to solve the problems of lacking of layering and authenticity,and non-real time,the traditional Lagrange-based method has been improved. Firstly,for the problem of the simplicity during particle motion in fluid simulation in the Lagrangian method,the Berlin noise function is introduced to enhance the layering of fluid motion;Secondly,the leapfrog time integration method with less storage requirement is used to accelerate the calculation speed in the fluid particle motion state,thereby improving the fluid-solid interaction simulation efficiency;Then,by applying a layer of reaction force at the solid boundary,the fluid particles entering the region are reacted,thereby effectively reducing the possibility of the fluid particles penetrating the solid boundary;Finally,in order to avoid the unreasonable elastic collision of particles during fluid-solid interaction and affect the interactive authenticity,recovery factor is introduced to control the kinetic energy of the particles after collision,so that the interaction is more real and natural. Several sets of fluid motion and fluid-solid interaction experiments were designed. The experimental results show that the fluids in different states can be simulated effectively and effectively,and the fluid-solid interaction effect can be simulated in real time.

关 键 词：流体模拟 流固交互 边界限制 恢复系数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]