A comparative study of truly incompressible and weakly compressible SPH methods for free surface incompressible flows

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	A comparative study of truly incompressible and weakly compressible SPH methods for free surface incompressible flows
	Chen Z; Zong Z; Liu MB(刘谋斌); Li HT; Liu, MB (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
发表期刊	INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
	2013-11-30
卷号	73 期号:9 页码:813-829
ISSN	0271-2091
摘要	In this paper, the performance of the incompressible SPH (ISPH) method and an improved weakly compressible SPH (IWCSPH) method for free surface incompressible flows are compared and analyzed. In both methods, the Navier-Stokes equations are solved, and no artificial viscosity is used. The ISPH algorithm in this paper is based on the classical SPH projection method with common treatments on solid boundaries and free surfaces. The IWCSPH model includes some advanced corrective algorithms in density approximation and solid boundary treatment (SBT). In density approximation, the moving least squares (MLS) approach is applied to re-initialize density every several steps to obtain smoother and more stable pressure fields. An improved coupled dynamic SBT algorithm is implemented to obtain stable pressure values near solid wall areas and, thus, to minimize possible numerical oscillations brought in by the solid boundaries. Three representative numerical examples, including a benchmark test for hydrostatic pressure, a dam breaking problem and a liquid sloshing problem, are comparatively analyzed with ISPH and IWCSPH. It is demonstrated that the present IWCSPH is more attractive than ISPH in modeling free surface incompressible flows as it is more accurate and more stable with comparable or even less computational efforts.
关键词	Incompressible Sph Weakly Compressible Sph Free Surface Flows Fluid-structure Interaction
学科领域	计算流体力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000325457000003
项目资助者	National Natural Science Foundation of China [11172306, 51221961, 51279030]; National Key Basic Research Special Foundation of China [2010CB832704, 2013CB036101]; Scientific Project for High-tech Ships: Key Technical Research on the Semi-planning Hybrid Fore-body Trimaran
课题组名称	LMFS冲击与耦合效应(LHO)
论文分区	Q3
引用统计	被引频次：49[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47506
专题	流固耦合系统力学重点实验室
通讯作者	Liu, MB (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Chen Z,Zong Z,Liu MB,et al. A comparative study of truly incompressible and weakly compressible SPH methods for free surface incompressible flows[J]. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS,2013,73,9,:813-829.
APA	Chen Z,Zong Z,Liu MB,Li HT,&Liu, MB .(2013).A comparative study of truly incompressible and weakly compressible SPH methods for free surface incompressible flows.INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS,73(9),813-829.
MLA	Chen Z,et al."A comparative study of truly incompressible and weakly compressible SPH methods for free surface incompressible flows".INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS 73.9(2013):813-829.

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