摘要
本文从N-S方程出发,建立了二维滑坡涌浪控制方程,使用二维非定常分离隐式PISO算法求解方程。通过UDF(User-Defined Function)编程,采用动网格技术控制滑体的运动,结合RNGk-ε湍流模型并采用VOF方法跟踪非线性自由表面流场,基于流体计算软件FLUENT模拟滑体下滑所引起的水的速度、自由表面高度变化以及流动过程,并将数值计算结果与Monaghan和Kos的试验数据进行比较。算例表明:本模型能很好地模拟出滑体下滑过程中孤立波的产生和传播以及涡流的形成。在此基础上,本文还研究了滑体速度对水体自由表面变形的影响。
According to N-S equation, the author established control equation of two-dimensional water waves due to landslide, and solved equation with two-dimensional unsteady separation PISO algorithm. The movement of sliding mass is controlled by UDF programming and dynamic mesh technology. The nonlinear free-surface fluid field is tracked with VOF method, combined with RNG k-e turbulence model. Via computational fluid dynamics software FLUENT, the velocity and height change of free-surface due to landslide are simulated, and the result is compared with the experiment of Monaghan and Kos＇ . The example shows that the model in this paper can properly simulate the generation and transition of solitary wave and formation of the vortex. On this basis, the paper further studies on the effects of landslide velocity on the deformation of free-surface. Therefore, the numerical simulation of sliding mass entering water can properly simulate the phenomenon of water waves generated by landslide due to the avalanche of reservoir dam, and provide the reservoir dam design and disaster prevention of water waves generated by landslides with very important reference value.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2009年第3期90-94,共5页
Hydrogeology & Engineering Geology
基金
国家科技支撑计划项目(2006BAC04B02)
国家973计划项目(2008CB425802)
国家自然科学基金项目(40602035)
国土资源大调查计划项目(121201064070)
上海市重点学科建设项目资助(B208)
关键词
滑坡涌浪
数值模拟
FLUENT
VOF方法
two-dimension
water waves due to landslide
numerical simulation
FLUENT
VOF method
