Title

Meshing requirements for tidal modeling in the Western North Atlantic

Authors

Authors

S. C. Hagen;D. M. Parrish

Comments

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Abbreviated Journal Title

Int. J. Comput. Fluid Dyn.

Keywords

mesh generation; localized truncation error analysis; tidal; computations; shallow water equations; TRUNCATION ERROR; GRIDS; Mechanics; Physics, Fluids & Plasmas

Abstract

This paper presents an a posteriori approach to unstructured mesh generation via a localized truncation error analysis and applies it to the Western North Atlantic Tidal (WNAT) model domain. The WNAT model domain encompasses the Gulf of Mexico, the Caribbean Sea, and the North Atlantic Ocean east to the 60degreesW Meridian. Herein, we pay particular attention to the area surrounding the Bahamas. A bathymetric data set with fine resolution is employed in seven separate linear, harmonic simulations of shallow water tidal flow for seven different tidal-forcing constituents. Each set of simulation results is used to perform a truncation error analysis of a linear, harmonic form of the depth-averaged momentum equations for each of the seven different tidal-forcing frequencies. Truncation error is then driven to a more uniform, domain-wide value by solving for local node spacing requirements. The process is built upon successful research aiming to produce unstructured grids for large-scale domains that can be used in the accurate and efficient modeling of shallow water flow. The methodology described herein can also be transferred to other modeling applications.

Journal Title

International Journal of Computational Fluid Dynamics

Volume

18

Issue/Number

7

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

585

Last Page

595

WOS Identifier

WOS:000224820100003

ISSN

1061-8562

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