A BOUNDARY-FITTED GRID MODEL FOR TIDAL MOTIONS - ORTHOGONAL COORDINATES GENERATION IN 2-D EMBODYING SINGAPORE COASTAL WATERS

This paper proposes a computational procedure for the generation of an orthogonal coordinate system based on the existing curvilinear coordi nates generation techniques. The paper is divided into three sections. Firstly a brief review of the curvilinear coordinates generation by t he elliptic grid generation technique along with the curvature constra int that governs the metric of a coordinate system is presented. A pro cedure for the generation of an orthogonal coordinate system is also o utlined. Secondly numerical solution for the grid generation system su ggested in the present grid generation procedure is described. The pro posed grid generation procedure is adopted for the generation of an or thogonal coordinate system for the 2-D domain of Singapore coastal wat ers. The generated grid demonstrates very satisfactory results.