An Improved Mathematical Model for Geological Analysis of Debris Flow

Wu Heng bin, He Si ming

Abstract


Based on computational fluid dynamics, the debris flow is considered as a one-dimensional, laminar, unsteady flow down a steep slope with Herschel-Bulkley rheological model, and the conservation of mass and momentum are integrated along the depth of plug zone and shear zone, respectively. In addition, the mathematical model is improved by analyzing the mainly influencing factors of debris flow and adding the drag force and earth pressure coefficient into the depth-averaged equations. The Lagrange difference method is used to solve the partial differential equations in this paper. the model can reproduce the motion of debris flow with a level of accuracy by comparing the results of two simple cases.


Full Text: PDF DOI: 10.5539/jgg.v6n1p129

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Journal of Geography and Geology   ISSN 1916-9779 (Print)   ISSN 1916-9787 (Online)

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