An SPH model for multiphase flows with complex interfaces and large   density differences

doi:10.1016/j.jcp.2014.11.037

CORC > 北京大学 > 工学院

	An SPH model for multiphase flows with complex interfaces and large density differences
	Chen, Z. ; Zong, Z. ; Liu, M. B. ; Zou, L. ; Li, H. T. ; Shu, C.
刊名	计算物理学杂志
	2015
关键词	Multiphase flows Smoothed particle hydrodynamics Interface Density difference SMOOTHED PARTICLE HYDRODYNAMICS LATTICE BOLTZMANN METHOD 2-PHASE FLOW SIMULATION BOUNDARY DYNAMICS
DOI	10.1016/j.jcp.2014.11.037
英文摘要	In this paper, an improved SPH model for multiphase flows with complex interfaces and large density differences is developed. The multiphase SPH model is based on the assumption of pressure continuity over the interfaces and avoids directly using the information of neighboring particles' densities or masses in solving governing equations. In order to improve computational accuracy and to obtain smooth pressure fields, a corrected density re-initialization is applied. A coupled dynamic solid boundary treatment (SBT) is implemented both to reduce numerical oscillations and to prevent unphysical particle penetration in the boundary area. The density correction and coupled dynamics SBT algorithms are modified to adapt to the density discontinuity on fluid interfaces in multiphase simulation. A cut-off value of the particle density is set to avoid negative pressure, which can lead to severe numerical difficulties and may even terminate the simulations. Three representative numerical examples, including a Rayleigh-Taylor instability test, a non-Boussinesq problem and a dam breaking simulation, are presented and compared with analytical results or experimental data. It is demonstrated that the present SPH model is capable of modeling complex multiphase flows with large interfacial deformations and density ratios. (C) 2014 Elsevier Inc. All rights reserved.; Computer Science, Interdisciplinary Applications; Physics, Mathematical; SCI(E); 0; ARTICLE; mbliu@pku.edu.cn; liht@dlut.edu.cn; 169-188; 283
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/206369]
专题	工学院
推荐引用方式 GB/T 7714	Chen, Z.,Zong, Z.,Liu, M. B.,et al. An SPH model for multiphase flows with complex interfaces and large density differences[J]. 计算物理学杂志,2015.
APA	Chen, Z.,Zong, Z.,Liu, M. B.,Zou, L.,Li, H. T.,&Shu, C..(2015).An SPH model for multiphase flows with complex interfaces and large density differences.计算物理学杂志.
MLA	Chen, Z.,et al."An SPH model for multiphase flows with complex interfaces and large density differences".计算物理学杂志 (2015).