碎屑流运动模拟及能量过程研究

针对碎屑流的运动发展及不同条件下的能量衰减过程问题,采用有限体积数值离散方法对碎屑流运动过程进行模拟,数值模拟通过了解析算例和实验算例的验证.计算表明数值计算具有较高的精度和分辨率,是稳定和有效的.在碎屑流运动模拟的基础上,对碎屑流运动的能量过程进行了计算和分析.结果表明碎屑流的能量过程主要由底面阻力条件控制,而地形曲率的向心作用将通过改变碎屑流的摩擦阻力显著地影响碎屑流的能量耗散过程.

Motion Simulation of Debris Flow and Research on Energy Process

Aiming at the analysis of energy attenuation process during the motion development of debris flow under different conditions, the numerical simulations of the motion process of debris flow are achieved by the method of finite volume discretization. These numerical simulations have been tested and verified by analytic examples and experiment tests. The results show that numerical simulations with high precision and high resolution are stable and effective. Furthermore, the energy process of debris flow is discussed on the basis of the numerical simulations. The results indicate that the energy change process of debris flow is mainly controlled by the basal resistance, and that the centripetal effect of topography curvature has a great influence on the process of energy attenuation by changing the friction resistance.