The Neko-TOP library provides a meshing tool that allows users to create meshes for their cases. The meshing tool is designed to work with the Neko-TOP library and the Neko library.

The meshing tool is a wrapper around a variety of meshing tools, such as Cubit, Gmsh, and Nek5000. It allows users to create meshes in a variety of formats, including Exodus II, Gmsh, and Nek5000, before ultimately converting it to the Neko supported format.

Supported meshing tools

The meshing tool supports the following meshing tools:

Usage

The meshing tool command line interface depends on the selected meshing tool.

genmeshbox

The genmeshbox tool is a simple meshing tool that generates a mesh for a rectangular box. It is a part of the Neko library and can be used to generate meshes for simple geometries. The command line interface is as follows:

mesh.sh --box [options] x0 x1 y0 y1 z0 z1 nx ny nz [px py pz]

Where:

x0, x1, y0, y1, z0, z1 are the coordinates of the box
nx, ny, nz are the number of elements in the x, y, and z directions
px, py, pz determine if a periodic boundary condition should be applied in the x, y, and z directions (optional, default is no periodicity)

Other meshing tools

The other meshing tools, such as Cubit and Gmsh, rely on input files that define the geometry and mesh parameters. The command line interface for these tools is typically more complex and requires the user to create input files that specify the geometry, mesh size, and other parameters. The Neko-TOP library provides a set of example input files which can be used as a starting point for creating your own input files.

mesh.sh [options] input_file

By default the input file is expected to be in the data directory of the Neko-TOP library and an output file will be created in the data_local directory.