staggered meshless solid-fluid coupling

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	staggered meshless solid-fluid coupling
	He Xiaowei ; Liu Ning ; Wang Guoping ; Zhang Fengjun ; Li Sheng ; Shao Songdong ; Wang Hongan
刊名	ACM TRANSACTIONS ON GRAPHICS
	2012
卷号	31 期号:6 页码:-
关键词	staggered SPH physically-based animation solid-fluid coupling
ISSN号	0730-0301
中文摘要	Simulating solid-fluid coupling with the classical meshless methods is an difficult issue due to the lack of the Kronecker delta property of the shape functions when enforcing the essential boundary conditions. In this work, we present a novel staggered meshless method to overcome this problem. We create a set of staggered particles from the original particles in each time step by mapping the mass and momentum onto these staggered particles, aiming to stagger the velocity field from the pressure field. Based on this arrangement, an new approximate projection method is proposed to enforce divergence-free on the fluid velocity with compatible boundary conditions. In the simulations, the method handles the fluid and solid in a unified meshless manner and generalizes the formulations for computing the viscous and pressure forces. To enhance the robustness of the algorithm, we further propose a new framework to handle the degeneration case in the solid-fluid coupling, which guarantees stability of the simulation. The proposed method offers the benefit that various slip boundary conditions can be easily implemented. Besides, explicit collision handling for the fluid and solid is avoided. The method is easy to implement and can be extended from the standard SPH algorithm in a straightforward manner. The paper also illustrates both one-way and two-way couplings of the fluids and rigid bodies using several test cases in two and three dimensions.
英文摘要	Simulating solid-fluid coupling with the classical meshless methods is an difficult issue due to the lack of the Kronecker delta property of the shape functions when enforcing the essential boundary conditions. In this work, we present a novel staggered meshless method to overcome this problem. We create a set of staggered particles from the original particles in each time step by mapping the mass and momentum onto these staggered particles, aiming to stagger the velocity field from the pressure field. Based on this arrangement, an new approximate projection method is proposed to enforce divergence-free on the fluid velocity with compatible boundary conditions. In the simulations, the method handles the fluid and solid in a unified meshless manner and generalizes the formulations for computing the viscous and pressure forces. To enhance the robustness of the algorithm, we further propose a new framework to handle the degeneration case in the solid-fluid coupling, which guarantees stability of the simulation. The proposed method offers the benefit that various slip boundary conditions can be easily implemented. Besides, explicit collision handling for the fluid and solid is avoided. The method is easy to implement and can be extended from the standard SPH algorithm in a straightforward manner. The paper also illustrates both one-way and two-way couplings of the fluids and rigid bodies using several test cases in two and three dimensions.
学科主题	Computer Science
收录类别	SCI ; EI
资助信息	National Basic Research Program of China 2009CB320804, 2010CB328002; National Natural Science Foundation of China 61173059, 61135003, 60925007, 60833007, 61121002, 61170205
语种	英语
WOS记录号	WOS:000311298900023
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iscas.ac.cn/handle/311060/15051]
专题	软件研究所_软件所图书馆_期刊论文
推荐引用方式 GB/T 7714	He Xiaowei,Liu Ning,Wang Guoping,et al. staggered meshless solid-fluid coupling[J]. ACM TRANSACTIONS ON GRAPHICS,2012,31(6):-.
APA	He Xiaowei.,Liu Ning.,Wang Guoping.,Zhang Fengjun.,Li Sheng.,...&Wang Hongan.(2012).staggered meshless solid-fluid coupling.ACM TRANSACTIONS ON GRAPHICS,31(6),-.
MLA	He Xiaowei,et al."staggered meshless solid-fluid coupling".ACM TRANSACTIONS ON GRAPHICS 31.6(2012):-.