A multiphase MPS solver for modeling multi-fluid interaction with free surface and its application in oil spill

被引:73
作者
Duan, Guangtao [1 ]
Chen, Bin [1 ]
Zhang, Ximin [1 ]
Wang, Yechun [1 ]
机构
[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
基金
美国国家科学基金会;
关键词
Moving particle semi-implicit (MPS) method; Multiphase flow; Free surface flow; Virtual particles; Pressure gradient model; Oil spills; SMOOTHED PARTICLE HYDRODYNAMICS; NUMERICAL-ANALYSIS; SEMIIMPLICIT METHOD; FLOWS; SIMULATION; STABILITY; DYNAMICS; FRAGMENTATION; PREDICTION; PRESSURE;
D O I
10.1016/j.cma.2017.03.014
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Numerical simulation of free surface multi-fluid flow is a challenging problem owning to the interaction between deformed interface and free surface. In this paper, a multiphase particle solver (free surface multiphase moving particle semi-implicit method, FS-MMPS) is developed to predict the early spreading flow of spilled oil where exist the oil water interface and air oil/air water free surface. First, a multiphase virtual particle model is proposed to substitute the inaccurate free surface boundary condition for multiphase flow in conventional MPS methods. Specifically, virtual particles of different liquid phases are compensated outside free surface so that the pressure of free surface particles can be solved from pressure Poisson equation, thereby improving the accuracy of multi-fluid interaction at free surface. Meanwhile, a pressure gradient model based on the coupling of Taylor series expansion and dynamic specification of particle stabilizing term (PST) is proposed to simultaneously enhance accuracy and depress instability caused by multiphase virtual particles. Experiments of early spreading of thick oil slicks and continuous oil spill from a damaged tank are conducted for validation and demonstration of the accuracy and stability enhancements in 2D. Finally, the effects of traveling wave and continuous spilling on oil spreading are investigated to show the capability of the proposed method. The spreading of thick oil slicks is accelerated when wave height increases or wave length decreases, and the largest increase of spreading rate accelerated by traveling wave is 14%. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:133 / 161
页数:29
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