基于光滑粒子流体动力学方法的空间液桥实验实时模拟  

Real-time simulation for space experiments in liquid bridge based on smoothed particle hydrohynamics method

作　　者：王萌[1,2] 郭丽丽[1] 于歌[1] 

机构地区：[1]中国科学院空间应用工程与技术中心 [2]中国科学院大学

出　　处：《计算机应用》2015年第A02期208-211,共4页journal of Computer Applications

基　　金：国家科技重大专项(Y2140411SN)

摘　　要：针对微重力环境下流体动态模拟的逼真度和效率问题,提出一种基于光滑粒子流体动力学(SPH)方法的空间液桥实验实时模拟方法。首先,借助计算机图形学和计算几何学的理论基础,结合空间液桥实验装置的三维模型,渲染了虚拟液桥实验的三维场景;其次,基于SPH方法建立液桥无网格的粒子模型,分析粒子在微重力条件下受力的特殊性,结合实验液体的密度、粘滞度等物理特性以及在微重力条件下的动态特性,模拟了空间中随实验操作的液桥形态变化过程;最后,仿真结果表明,该方法实现了微重力条件下液桥实验的实时动态模拟,并可应用于其他空间流体的动态仿真。Since the inefficiency and low fidelity of simulation about dynamic fluid in the microgravity environment,a method based on Smoothed Particle Hydrodynamics（ SPH） was proposed to simulate microgravity experiments on the thermocapillary convection in liquid bridge in real-time. Firstly, with the theoretical basis of computer graphics and computational geometry,this method rendered the virtual 3D experimental scene,combining with the 3D model file of experimental device. Secondly,the mesh-free particle model was established,and the specificity of the force for fluid was analyzed. Considering the physical properties of the fluid,such as the density and viscosity,and dynamic characteristics in microgravity condition,the shape of liquid bridge changing with space operation was simulated. Finally,the result of simulation has demonstrated that the proposed method has successfully modeled the process of microgravity experiments and it can be used in other space experiments about fluids.

关 键 词：场景渲染 光滑粒子流体动力学 流体仿真 微重力 液桥实验 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]