Three-Dimensional Modeling of Pollutant Transportby A. K. M. Quamrul Ahsan, Stevens Inst of Technology, United States,
Michael S. Bruno, Stevens Inst of Technology, United States,
Abstract: A numerical model for pollutant transport in coastal waters has been developed in x-y-z-t space. The simplicity of a fixed Eulerian mesh and a computationally efficient Lagrangian approach has led to the adoption of a combined, Eulerian-Lagrangian model. The conventional transport equation is decoupled into the advective and diffusive components. The former component is solved by the method of characteristics with a higher order Hermite tricubic interpolation scheme and the latter component is solved by a Crank-Nicholson implicit finite difference scheme on a fixed Eulerian grid system. In order to demonstrate the superior performance of the scheme the propagation characteristics of the model are analyzed.
Subject Headings: Hydrologic models | Numerical models | Three-dimensional models | Water pollution | Mathematical models | Pollutants | Three-dimensional flow | Water supply systems
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