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Your search keyword '"Wang, Deguan"' showing total 17 results
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17 results on '"Wang, Deguan"'

11. Numerical modeling of Anhui debris flow

Author

Han, Guoqi and Wang, Deguan

Subjects
Sediment transport -- Models, Dams -- Models, Viscoelasticity -- Models, Stress analysis (Engineering) -- Models, Engineering and manufacturing industries, Science and technology
Abstract

A mathematical model is formulated to simulate dam-break transient debris flows, in which the debris and water mixture is assumed to be isotropic and continuous. In terms of its viscoelastoplasticity, a three-dimensional (3D) rheologic model for Bingham body is used to describe the relationship between the stress tensor and the rate of strain. Only the deformation caused by the deviatoric stress tensor is taken into account. Under the prior considerations, the governing equations for two-dimensional (2D) depth-averaged transient debris flows are obtained by integrating the equation of continuity and equations of motion over depth for 3D flows. To deal with the transient and high-speed features of dam-break debris flows, the derived governing equations are discretized and solved using the method of characteristics. The model is applied to simulate the dam-break debris flow of April 30, 1986, for the Jinshan debris reservoir in Anhui, China. The debris and water mixtures reach as far as 900 m downstream from the initial tailings dam site, with a depth of 1.7 m near the tailings dam and 1.0 m at 900 m downstream. These model results are in good agreement with the available observations.

Published
1996

12. Numerical simulation of thermal discharge based on FVM method

Author

Lai Xi-jun, Wang Deguan, Wang Zhigang, and Yu Yunli

Subjects
Finite volume method, Discretization, Power station, Computer simulation, Flux, Ocean Engineering, Mechanics, Oceanography, Thermal, Heat transfer, Environmental science, Geotechnical engineering, Shallow water equations, Physics::Atmospheric and Oceanic Physics
Abstract

A two-dimensional numerical model is proposed to simulate the thermal discharge from a power plant in Jiangsu Province. The equations in the model consist of two-dimensional non-steady shallow water equations and thermal waste transport equations. Finite volume method (FVM) is used to discretize the shallow water equations, and flux difference splitting (FDS) scheme is applied. The calculated area with the same temperature increment shows the effect of thermal discharge on sea water. A comparison between simulated results and the experimental data shows good agreement. It indicates that this method can give high precision in the heat transfer simulation in coastal areas.

Published
2006
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