The Movement Mechanism Of Viscous Debris Flow And Study Of Numerical Simulation

The movement of debris flow is a complex and unsteady multiphase flow, studying its movement mechanism is one of the important contents of debris flow, and belongs to the forefront and interdisciplinary theoretical foundation on debris flow, The study involves fluid mechanics, soil, geology, disaster science, hydrology, computational mechanics, and so on, which is a interdisciplinary and multidisciplinary science. The study of movement mechanism improves the debris flow disaster prevention and controlling, can provide a theoretical support and guidance. The numerical analysis of viscous debris flow integrates debris flow, computer science, mathematical physics calculations, software and other scientific disciplines, becoming a new cross-compound formation, which is classified in a new field of the study of computer science on the mud-rock flow , The value is significance not only in research but also practical application of theory.in order to analyze its movement characteristics, which reveals the mechanism of viscous debris flow, summarizing some previous research results of debris flow, and based on the phenomenon of laboratory test and the results, this paper discusses the occurrence, start-up, abrasion, the accumulation of viscous debris flow and other related mechanism; and thus uses the results of the analysis to establish the basic characteristics framework model. To better explain the relationship of each phase in viscous debris flow, the paper utilizes some basis theory of the hydraulic fluid dynamics, in the certain assumptions, derives a group control equations of the movement of viscous debris flow, at the same time simplifies it and forms a finite element method discrete equations and whole finite element equation; Similarly, considering interactions between the viscous slurry and the valley banks, establishes control equations of the viscous debris flow and the valley between the banks and a discrete coupled equations format; at last the paper depends on computer simulation analysis of viscous debris flow to analyze its characteristics from the view of visualization of the viscous debris flow movement. Finally, the paper combines the simulation results and experimental phenomena to summarize viscous debris flow Characterization and its movement mechanism.The main results achieved in the paper are as follow:1). put forward that debris flow characteristics belongs to the macro-characterization of the its movement mechanism, so the study characteristics of debris flow should reveal the mechanism of debris flow movement. On this basis, the paper constructs the basic characteristics framework model by analyzing the summary the characteristics of viscous debris flow movement;2).on basis of theory of the hydraulic fluid dynamics, derives a group of control equations of the movement of viscous debris flow, and simplifies it and forms a finite element method discrete equations and the whole finite element equation; Similarly, considering interactions between the viscous slurry and the valley banks, establishes control equations of the viscous debris flow and the valley between the banks and a discrete coupled equations format; 4).On the platform of AutoCAD2009 Beta version, using measured valley data, draws three-dimensional Valley contour map, On the platform of UG NX6.0 beta version, establishes of the three-dimensional valley model, and On the platform of ANSYS Workbench 11 beta version divides the model into network cell, and finally simulates three-dimensional debris flow and coupling flow between the valley and debris flow. This is a success to attempts of the organic integration between the theoretical study of debris flow and computer science, which expands the idea of debris flow research.