| 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.
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| Source Publication | INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
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| 2013-11-30 | |
| Volume | 73Issue:9Pages:813-829 |
| ISSN | 0271-2091 |
| Abstract | 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. |
| Keyword | Incompressible Sph Weakly Compressible Sph Free Surface Flows Fluid-structure Interaction |
| Subject Area | 计算流体力学 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000325457000003 |
| Funding Organization | 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 |
| Department | LMFS冲击与耦合效应(LHO) |
| Classification | Q3 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/47506 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Liu, MB (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China. |
| Recommended Citation 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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