Author(s)

Jung L. Lee

Abstract

In this study a new hybrid method is proposed for solving flow-dominated transport problems accurately and effectively. The method takes the forward- tracking particle method for advection. However, differently from the random- walk Lagrangian approach, it solves the diffusion process on the fixed Eulerian grids. Therefore, neither any interpolating algorithm nor a large enough number of particles is required. The method was successfully examined for both cases of instantaneous and continuous sources discharged at a point. Comparison with a surrounding 5-point Hermite polynomial method (Eulerian- Lagrangian method) and the random-walk pure Lagrangian method shows that the present method is superior in result accuracy and time-saving ability. 1 Introduction Si

Keywords