Numerical Solution Technique: Difference between revisions
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<div class="title">Numerical Solution Technique</div> | <div class="title">Numerical Solution Technique</div> | ||
==Vertical | ==Horizontal and Vertical Discretization== | ||
[[Image:staggered_grid_rho_cells.png|ROMS staggered rho grid]] | [[Image:staggered_grid_rho_cells.png|ROMS staggered rho grid]] | ||
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 (active and passive) are located at the center of the grid cell. The vertical velocity (ω, w) and vertical mixing variables (Akt, Akv, etc) are located at the bottom and top faces of cell. See diagram below. | |||
[[Image: | [[Image:vieste-dubrovnik.png|left|frame|<center>Vieste-Dubrovnik Transect</center>]] | ||
[[Image:vertical_grid.png|none|frame|<center>ROMS vertical grid</center>]] | |||
<div style="clear:both;"></div> | |||
[[Image: | |||
==Time-Stepping== | ==Time-Stepping== | ||
Revision as of 13:28, 7 March 2008
Numerical Solution Technique
Horizontal and Vertical 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 (active and passive) are located at the center of the grid cell. The vertical velocity (ω, w) and vertical mixing variables (Akt, Akv, etc) are located at the bottom and top faces of cell. See diagram below.
