A 2D well-balanced, coupled model of water flow, sediment transport,and bed evolution based on unstructured grids with efficient variable storage strategy
A 2D well-balanced, coupled model of water flow, sediment transport,and bed evolution based on unstructured grids with efficient variable storage strategy作者机构：Department of Mechanics Beijing Institute of Technology Changjiang Survey Planning Design and Research Co. Ltd (CSPDR) Changjiang River Scientific Research Institute Department of Ocean Engineering Ocean College Zhejiang University State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University
出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))
年 卷 期：2021年第36卷第1期
页 面：151-160页
核心收录：
学科分类：08[工学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程]
基 金：financially supported by the National Natural Science Foundation of China (Grant Nos. 11602034 11872117 and 11502032)
主 题：Two-dimensional coupled model Well-conserved Unstructured grids Finite-volume algorithm Erodible bed Central model
摘 要：In recent decades,a few Godunov-type,finite volume two-dimensional(2 D) unstructured grid,coupled flow,and sediment models(GF2 DUCM) have been developed for flows over erodible *** kinds of models are generally analyzed as a Vertex Model(VM) that define topography at the cell vertex,which can lead to the non-conservation of mass regarding flow,sediment,and bed ***,a full cellcantered variable storage method(Central Model or CM) is applied as the solution of the GF2 *** this method,terrain elevation is defined at the cell centroids;this accurately describes the physical relations between the water depth and topography *** approach can fully eliminate calculation errors in topography deformation at local cells caused by the interpolation of topography deformation at the cell vertex,and reduced uncertainty in the computation of the GF2 *** model performance is systematically tested using a series of laboratory experiments,which demonstrate the mass conservation feature and high accuracy in reproducing hydrodynamic and morphological processes.
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