ADMESH: A Graphical User Interface for an Advanced Mesh Generator for Coastal Ocean Modeling

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Title: ADMESH: A Graphical User Interface for an Advanced Mesh Generator for Coastal Ocean Modeling
Creators: West, Dustin
Advisor: Kubatko, Ethan
Issue Date: 2012-06
Abstract: The development and implementation of an advanced mesh generator, called ADMESH, that is capable of automatically producing high-quality unstructured meshes starting with only target minimum and maximum element sizes and points defining the boundary and bathymetry/topography of the domain is presented. The automatic mesh generator incorporates some the the latest and most advanced techniques recently developed in the area of mesh generation, as well novel approaches to incorporate factors that are specific to the problem of shallow water flow. Some of the techniques that are incorporated include a novel approach to compute exact signed distance functions, which are widely used in the context of level set methods, the approximation of piecewise linear coastline data by smooth cubic splines, which are used to compute shoreline curvature, and a so-called mesh size function, which is used to determine element sizes and control the size ratio of neighboring elements. The mesh generation approach is implemented in MATLAB and uses an interactive Graphical User Interface (GUI) that allows the user to view and edit input data and produce relevant output. The GUI also contains an option to extract coastline data via the National Oceanic and Atmospheric Administration’s (NOAA) web-based coastline extractor database. The capabilities of ADMESH will be demonstrated in a series of examples and a number of meshes created by ADMESH will be presented and assessed in terms of element quality.
Embargo: No embargo
Series/Report no.: The Ohio State University. Department of Civil and Environmental Engineering and Geodetic Science Honors Theses; 2012
Keywords: mesh generation
shallow water
finite elements
Sponsors: Engineering Honors Committee
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