抄録
The study proposes a simple wetting and drying scheme for analyzing environmental fluid flows using a fixed grid on z-coordinate. The wetting and drying process is especially important in the low-lying coastal areas with large amplitude tides and reservoirs with severe flooding and discharging because it drastically changes the horizontal extent of the water body. The basic idea of the present scheme is a partial-cell (cut-cell) representation of the structured grid based on a finite-volume method to reconstruct the computational domain in response to a surface evolution. The scheme was implemented to an object-oriented numerical model, Fantom3D, and tested against analytical solutions and applied to field scale phenomena. The computed results agree reasonably well with the analytical solutions. We showed that the proposed scheme is a useful technique to compute the flow in partially dry domain for the hydrodynamic models using z-coordinate.
