一维粘性泥石流运动的格子Boltzmann模拟

Lattice Boltzmann Model of One-Dimension Movement of Debris Flow

利用格子Boltzmann方法,对一维粘性泥石流的运动进行了定量化研究和数值模拟,为进一步研究泥石流的运动机制奠定了基础。在模拟一维粘性泥石流运动时,采用了含外力项的格子Boltzmann模型,通过对外力因子、平衡态分布函数的构造,使得宏观统计特性刻画了泥石流运动的非线性特征,成功模拟了泥石流的运动过程,获得了泥石流水深、流速两大要素的时空变化规律,为研究泥石流运动过程提供了一种新手段。

Based on the lattice Boltzmann method, one-dimension movement of debris flow is quantitatively studied and simulated, which lay the foundation for further study the mechanism of movement debris flow. In order to simulate the movement of debris flow, the lattice Bohzmann model with factor of outside force is set up. The model depicts the nonlinear character of movement of debris flow, through the equilibrium distribution functions and factor of outside force. Under the lattice Boltzmann model, one-dimension movement of debris flow is simulated and the spatial and temporal variations of depth and velocity of debris flow are obtained. The lattice Boltzmann model provides a new method for the study of the movement of debris flow.