Research Of Numerical Simulation Of Debris Flow And Step-pool Energy Dissipation System Based CFX

Debris flow is a very common geological disaster, which breaks out suddenly, with a strong destructive, and can cause huge economic losses and serious casualties each year. After the disaster of debris flow, regional ecological environment balance could be damaged, soil erosion and desertification processes could be increased, and effects are far-reaching. In the current process of building a moderately prosperous society, along with urbanization and economic development of the construction of the extension of the mountains, the dangers of the mountain of debris flow growing caused people’s attention, effective control of mudslides has become widespread important issue of concern in academia area. Since the20th century, scholars launched a large number of scientific studies of mudslides. Currently, research on debris flow includes the studies of fluid model research, forecasting and early warning of debris flow, and assessment of debris flow disaster, numerical simulation of the flow characteristics of debris and various debris flow control structures and systems.In this paper, Dadigou mudslides, Tanchang County, in Gansu Province was taken as the research object, using three-dimensional contour physical model,in CFX14.0software to carry out Dadigou flow simulation and flow field data obtained import ANSYS, analysis the two-way fluid-solid interaction of debris flow and blocking dam, the main contents are as follows.This paper discussed understanding and research about the debris flow control technology and the current research status of domestic and international;This paper analyzed several types of debris flow starts and the formation conditions, introduced the basic theory of computational fluid dynamics and solving method of debris flow and structural fluid-structure interaction;By using three-dimensional contour map of Dadigou, Tanchang County, in Gansu Province, this paper implored AutoCAD,3DMAX and Rhinoceros3D modeling software, and build a three-dimensional physical model of a large trench1:1;Under the ANSYS Workbench platform, this paper simulated flow velocity and pressure of Dadigou, and imported numerical results into the finite element analysis software ANSYS to calculate fluid-structure interaction, draw interaction between the flow field and mudslides blocking dam between power blocking dam response and its influencing factors, reference governance programs as well as a large selection of waste debris flow prevention planning design;Application of CFX14.0software, this paper simulated natural and artificial channel constructed step-pools under different channel than the difference between the speed and flow of both, a detailed study of the different channel than the drop and flow rate on the ladder-pit entrance flow velocity flow pattern characteristics, impact energy dissipation characteristics for practical engineering artificial construct ladder-optimized pit design and reasonable to determine the design flow provides a reference.