摘要
将粘性河岸崩塌模拟力学方法与水沙模型相结合,构建了考虑河岸变形的三维数值模型。基于非正交网格,采用局部网格可动技术处理由河岸崩塌引起的河道摆动过程。模型采用有限体积法对方程进行离散,采用与动量插值技术相结合的SIMPLEC算法进行模型求解。通过弯道发展过程的计算表明,模型能够有效地模拟出河道的复杂演变过程。
A 3D mathematical modeling considering bank erosion is developed by using both a cohesive bank erosion model and a 3D flow-sediment transport model. The locally-adaptive grid system based on the non-orthogonal grid is proposed to simulate the lateral migration in the channel due to the bank erosion. The governing equations for flow-sediment transport are solved with the finite volume method and the SIMPLEC algorithm with the momentum interpolation. The computed case of the self-forming meander evolution demonstrates that this model is able to predict the complex fluvial processes in alluvial rivers with bank erosion.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2009年第3期311-317,共7页
Advances in Water Science
基金
国家自然科学基金资助项目(50879042
50221903)
国家科技支撑计划资助项目(2006BAB05B03
2006BAB05B02)~~
关键词
河岸崩塌
三维模型
水沙数值模拟
河床变形
bank erosion
3D mathematical model
flow-sediment numerical simulation
fluvial processes
