3D Numerical Simulation of Deposition Patterns due to Sand Disposal in Flowing Water

Autor:	F.X. Ma, Chi Wai Li
Rok vydání:	2001
Předmět:	Hydrology Buoyancy Advection Water flow Mechanical Engineering Finite difference method Finite difference Mechanics engineering.material Settling engineering Deposition (phase transition) Conservation of mass Geology Water Science and Technology Civil and Structural Engineering
Zdroj:	Journal of Hydraulic Engineering. 127:209-218
ISSN:	1943-7900 0733-9429
DOI:	10.1061/(asce)0733-9429(2001)127:3(209)
Popis:	A 3D numerical model has been developed to study the deposition patterns for sediment dumping in ambient water with cross-flow. The model formulation is based on the governing equations for the conservation of mass, momentum, and density excess, assuming the discrete particles can be represented by a continuous field of density difference with a specified settling velocity. To model the turbulence generated by the particles, a buoyancy extended k-e model is employed. Numerically, the governing equations are split into three parts in the finite-difference solution: advection, dispersion, and pressure propagation. The advection part is solved by a characteristics-based scheme, the dispersion part is solved by the central difference method, and the pressure propagation part is solved implicitly by using the Gauss-Seidel iteration method. The computed results show that two different deposition patterns exist. One is oblong, and the other is horseshoe-shaped, depending on the ratio of the initial negative buoy...
Databáze:	OpenAIRE
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