Chapter 1
Introduction

This tutorial covers a new feature of NekMesh introduced in the two-dimensional mesh generator. This feature focuses on the creation of a NACA profile surrounded by a rectangular bounding box as well as its meshing.

To achieve the goals of this tutorial you will need an installation of the latest master version of Nektar++, available at nektar.info. This is because the features you will be using are relatively new and have yet to be included in the latest release. Standard installation instructions are applicable as described in the user guide, with one addition that CMake should be configured to include NEKTAR_USE_MESHGEN=ON. This will activate the installation of the relevant meshing routines.

This tutorial additionally requires:

• Nektar++ IncNavierStokesSolver with pre- and post-processing tools,
• A visualisation tool such as Paraview or VisIt

1.1 Goals

After the completion of this tutorial, you will be familiar with:

• the generation of a 2D mesh from the NACA generator;
• the visualisation of the mesh in Paraview or VisIt
• running a simple simulation on this mesh with IncNavierStokesSolver; and
• the post-processing of the data and the visualisation of the results in Paraview or VisIt.

The tutorial folder contains:

• an .mcf file;
• a session file which will run the NACA mesh.