Abstract
Abstract. OceanMesh2D is a set of MATLAB functions with preprocessing and post-processing utilities to generate two-dimensional (2-D) unstructured meshes for coastal ocean circulation models. Mesh resolution is controlled according to a variety of feature-driven geometric and topo-bathymetric functions. Mesh generation is achieved through a force balance algorithm to locate vertices and a number of topological improvement strategies aimed at improving the worst-case triangle quality. The placement of vertices along the mesh boundary is adapted automatically according to the mesh size function, eliminating the need for contour simplification algorithms. The software expresses the mesh design and generation process via an objected-oriented framework that facilitates efficient workflows that are flexible and automatic. This paper illustrates the various capabilities of the software and demonstrates its utility in realistic applications by producing high-quality, multiscale, unstructured meshes.
Highlights
Many phenomena in the coastal ocean, such as tides, tsunamis, and storm surges, can be accurately modeled by the shallow water equations
We build on many of the ideas described in Advanced Mesh generator (ADMESH) with the following primary improvements: (a) a focus on computational efficiency to enable the software to become practically useful even for large geophysical datasets (e.g., ∼ 1 km resolution global topo-bathy) in the MATLAB scripting language; (b) the inclusion of preprocessing and post-processing workflows; (c) a greater variety of mesh size functions and flexibility in their application, which offers more control over mesh resolution placement; and, critically, (d) code written in an open-source environment for the benefit of the community
The first example produces a mesh of the Jamaica Bay estuary in New York (JBAY), demonstrating the utility of the software in incorporating high-resolution (∼ 1/9 arcsec or approximately 3 m horizontal resolution) light detection and ranging datasets with fine-resolution (∼ 15 m) triangular elements nearshore
Summary
Many phenomena in the coastal ocean, such as tides, tsunamis, and storm surges, can be accurately modeled by the shallow water equations. We build on many of the ideas described in ADMESH with the following primary improvements: (a) a focus on computational efficiency to enable the software to become practically useful even for large geophysical datasets (e.g., ∼ 1 km resolution global topo-bathy) in the MATLAB scripting language; (b) the inclusion of preprocessing and post-processing workflows; (c) a greater variety of mesh size functions and flexibility in their application, which offers more control over mesh resolution placement; and, critically, (d) code written in an open-source environment for the benefit of the community. The rest of this paper is structured as follows: we begin by introducing the framework and organization of the code, followed by a detailed description of each of the four stand-alone classes
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