泥石流与主河交汇区三维数值模拟  

Three dimensional numerical simulation of confluence of debris flow and main river

作　　者：陈春光[1] 姚令侃[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《重庆交通学院学报》2006年第2期61-65,共5页Journal of Chongqing Jiaotong University

基　　金：国家自然科学基金项目(49831010)资助

摘　　要：依据流体力学和非牛顿流体力学原理,建立了交汇区混合流运动方程,分析并提出了双场交汇计算的耦合模型,主要包括数值计算方法、交汇区流变关系和泥沙沉降关系.通过计算表明,该三维耦合计算模型能与实测资料相吻合,并能详细刻画交汇区泥沙浓度分布规律及主河水位的变化.To study the mechanism of confluence between debris flow and the main river, based on the theory of Newtonian and non-Newtonian fluid dynamics, the theoretical equation to describe the movement of debris flow in the confluence was established, and three-dimensional simulate model was also put forward, which includes numerical calculation method, the rheologic equation and the sediment deposit and transportation in a conjunction area. The calculation shows that this method is really feasible for analysis of the distribution of sediment density and the change of water level, the calculation results are in good agreement with the model test data.

关 键 词：泥石流 主河 交汇 MAC法 数值模拟 

分 类 号：P642.23[天文地球—工程地质学]