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	A large time step Godunov scheme for free-surface shallow water equations
	Renyi Xu ; Deyu Zhong ; Baosheng Wu ; Xudong Fu ; Runze Miao ; Renyi Xu ; Deyu Zhong ; Baosheng Wu ; Xudong Fu ; Runze Miao
	2016-03-30 ; 2016-03-30
关键词	Large time step scheme CFL number Shallow water equations Random choice method O175
其他题名	A large time step Godunov scheme for free-surface shallow water equations
中文摘要	An algorithm for simulating free surface flows is presented using large time step based on the wave-propagation method proposed by LeVeque,and an exact Riemann solver is used.A multiple wave approximation approach was suggested for eliminating the discontinuities found in the rarefaction fans of dam-breaking flows.In addition,we use the random choice method to reduce non-physical oscillations.Applications demonstrate that the algorithm proposed in this paper can considerably increase the CFL number up to 25when modeling dam-break flows,while retaining satisfactory accuracy and efficiency.This suggests that our algorithm has the potential to be applied to modeling free surface flows.; An algorithm for simulating free surface flows is presented using large time step based on the wave-propagation method proposed by LeVeque,and an exact Riemann solver is used. A multiple wave approximation approach was suggested for eliminating the discontinuities found in the rarefaction fans of dam-breaking flows. In addition,we use the random choice method to reduce non-physical oscillations.Applications demonstrate that the algorithm proposed in this paper can considerably increase the CFL number up to 25when modeling dam-break flows,while retaining satisfactory accuracy and efficiency. This suggests that our algorithm has the potential to be applied to modeling free surface flows.
语种	英语 ; 英语
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/148670]
专题	清华大学
推荐引用方式 GB/T 7714	Renyi Xu,Deyu Zhong,Baosheng Wu,et al. A large time step Godunov scheme for free-surface shallow water equations[J],2016, 2016.
APA	Renyi Xu.,Deyu Zhong.,Baosheng Wu.,Xudong Fu.,Runze Miao.,...&Runze Miao.(2016).A large time step Godunov scheme for free-surface shallow water equations..
MLA	Renyi Xu,et al."A large time step Godunov scheme for free-surface shallow water equations".(2016).

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