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DOI	10.1016/j.advwatres.2019.103474
	A new collision operator for lattice Boltzmann shallow water model: a convergence and stability study
	Venturi S.; Di Francesco S.; Geier M.; Manciola P.
发表日期	2020
ISSN	0309-1708
卷号	135
英文摘要	This work presents a new lattice Boltzmann model for steady and unsteady two-dimensional shallow water flows. Compared to previous lattice Boltzmann based shallow water models, the proposed method uses a consistent characteristic speed in the pressure term and in the viscosity. To preserve the isotropy of viscosity, the relaxation rates for the different cumulants have to be decoupled. This is only possible by using multiple relaxation rates. The recovery of the correct viscosity is investigated by a convergence study based on the decay of a Taylor Green Vortex. Results from shallow water models using the proposed collision operator are then compared to those derived from standard BGK approach and from a continuous model. © 2019 Elsevier Ltd
关键词	Water resources Collision operators Convergence Convergence and stability Cumulants Lattice boltzmann models Shallow water model Shallow waters Taylor-Green vortex Viscosity computational fluid dynamics convergence flow modeling shallow-water equation steady flow two-dimensional modeling unsteady flow viscosity water flow
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131880
推荐引用方式 GB/T 7714	Venturi S.,Di Francesco S.,Geier M.,et al. A new collision operator for lattice Boltzmann shallow water model: a convergence and stability study[J]. Advances in Water Resources,2020,135.
APA	Venturi S.,Di Francesco S.,Geier M.,&Manciola P..(2020).A new collision operator for lattice Boltzmann shallow water model: a convergence and stability study.,135.
MLA	Venturi S.,et al."A new collision operator for lattice Boltzmann shallow water model: a convergence and stability study".135(2020).