基于粒子的流体和可形变固体双向耦合  

Particle Based Two-way Coupling of Fluid and Deformable Solid

作　　者：袁志勇[1] 郭甲翔[1] 杨成[1] 韩婕[1] 廖祥云[1] 

机构地区：[1]武汉大学计算机学院,武汉430072

出　　处：《系统仿真学报》2013年第10期2327-2331,共5页Journal of System Simulation

基　　金：国家自然科学基金(61272276);北航虚拟现实技术与系统国家重点实验室开放课题基金(BUAA-VR-13KF-15)

摘　　要：提出了一种适用于流体与可形变固体之间的双向耦合算法。所述模型的构建采用真实力学对流体、固体分别进行描述。由于网格法在表现流体运动的局限性与计算效率上的不足,因此采用SPH(Smoothed Particle Hydrodynamics)方法对流体、固体受到的力进行离散化处理。完全适用于粒子模型的高鲁棒性流固耦合算法并不多见,双向耦合算法相关研究更少。采用动量守恒定律提出了一种完全适用于粒子模型的双向耦合算法,通过计算流固模型之间的压力与摩擦力仿真耦合过程。所述算法的优点是不需要粒子模型的法向量信息、不需要捕捉模型的表面粒子,同时考虑了耦合时的摩擦力导致的能量损耗。实验结果表明,所提出的双向耦合算法能较好地处理流体与可形变固体之间的耦合效果。A two-way coupling algorithm of fluid and deformable solid was proposed. The model was constructed based on real physical mechanics of solid and fluid. Because of the limitations of fluid motion simulation and the lack of computational efficiency in mesh method, Smoothed Particle Hydrodynamics （SPH） method was used to discrete the forces acting on fluid and deformable solid. Meanwhile, fully applicable fluid-solid coupling algorithm in particle-based model of high robustness was not common, and the two-way coupling related research was rarer. Therefore, a particle-based two-way coupling algorithm was proposed based on the law of momentum conservation, which simulated coupling process by pressure and friction forces. The algorithm did not require the vector information in particle-based model, did not need to capture the surface particles of the model, and took the energy loss due to friction into account when coupling. Experimental results show that the two-way coupling algorithm can efficiently handle the coupling simulation between fluid and deformable solid.

关 键 词：粒子模型 双向耦合 弹性力学 流固耦合 SPH 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]