抄録
The generic length scale (GLS) turbulence closure model has been implemented to an object-oriented 3D hydrodynamic simulator, Fantom Unstructured, to investigate geophysical flows. This paper summarizes the basics of the GLS turbulence closure model, its parameters and the discretization on an orthogonal unstructured grid. The performance of the present simulator with the GLS turbulence closure model was examined for open channel steady flow and mixed-layer deepening problems, then the computed results were compared with analytical and empirical solutions. The choice of the two-equation model and stability function affects the vertical distribution of turbulence quantities, however, the reasonable agreements are obtained for the vertical distribution of the horizontal velocity and mixed-layer depth between computed results and the solutions.
