Numerical Solution Technique: Difference between revisions
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==Vertical and Horizontal Discretization== | ==Vertical and Horizontal Discretization== | ||
The ROMS governing equations are discretized over variable topography using a stretched, terrain-following, vertical coordinate. As a result, each grid cell may have different level thickness (Hz) and volume. The model state variables are vertically staggered so that horizontal momentum (u,v), density, and tracers (T, S, etc) are located at the center of the grid cell and the vertical velocity (ω, w) are located at the bottom and top faces of cell, as illustrated below. | The ROMS governing equations are discretized over variable topography using a stretched, terrain-following, vertical coordinate. As a result, each grid cell may have different level thickness (Hz) and volume. The model state variables are vertically staggered so that horizontal momentum (u,v), density, and tracers (T, S, etc) are located at the center of the grid cell and the vertical velocity (ω, w, Km, Kh) are located at the bottom and top faces of cell, as illustrated below. | ||
[[Image:vertical_grid.png|ROMS vertical grid]] | [[Image:vertical_grid.png|ROMS vertical grid]] | ||
Revision as of 18:21, 27 February 2008
Numerical Solution Technique
Vertical and Horizontal Discretization
The ROMS governing equations are discretized over variable topography using a stretched, terrain-following, vertical coordinate. As a result, each grid cell may have different level thickness (Hz) and volume. The model state variables are vertically staggered so that horizontal momentum (u,v), density, and tracers (T, S, etc) are located at the center of the grid cell and the vertical velocity (ω, w, Km, Kh) are located at the bottom and top faces of cell, as illustrated below.
