A Godunov-type scheme for modelling 1D channel flow with varying width and topography

A Godunov-type scheme for modelling 1D channel flow with varying width and topography
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用于模拟具有不同宽度和地形的一维河道流的 Godunov 型方案

DOI:
10.1016/j.compfluid.2010.12.009
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发表时间:
2011
期刊:
影响因子:
2.8
通讯作者:
Alias N
Alias N
中科院分区:
工程技术3区
文献类型:
--
作者:
Alias N

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一维 (1D) 数值模型长期以来一直用于模拟河流流体动力学。虽然大多数模型都是基于全一维圣维南方程的一些近似形式的解,但我们希望有一个一维代码能够处理某些洪水条件下的高度动态和复杂的流动,并充分考虑对流和源项。因此,本文提出了一种戈杜诺夫型替代方案,用于求解具有复杂源项的一维非齐次浅水方程。该模型还实现了湿润和干燥条件,以避免产生负水深。通过选择具有参考解决方案的稳态和瞬态液压问题来验证所提出的模型。
One-dimensional (1D) numerical models have long been used in simulating fluvial hydrodynamics. While most of these models are based on the solutions to some approximate forms of the fully 1D St. Venant equations, it is desirable to have a 1D code that can deal with those highly dynamic and complex flows under certain flood conditions, with full consideration of the convective and source terms. This paper therefore presents a Godunov-type alternative for solving the 1D inhomogeneous shallow water equations with complex source terms. The model is also implemented with a wetting and drying condition to avoid producing negative water depth. The proposed model is validated by a selection of steady and transient hydraulic problems with reference solutions.
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