Geometry and Meshing#

Author: Jonathan Hargreaves

Warning

This part of the site is currently under development. Its content is incomplete.

This page will discuss the differences between geometry and a mesh It will also signpost the sub-pages.

Geometry#

  • Exact definition of geometry (correct curvature etc.)

  • Surface sections can be large w.r.t. wavelength

../_images/geom-and-mesh-geom.png

Fig. 8 Exhaust Muffler Geometry. Image credit: Jonathan Hargreaves. Produced using COMSOL Multiphysics™#

Mesh#

  • Approximate version of geometry

    • nodes ‘sampled’ from geometry then curvature of elements is interpolated

  • Elements should be small w.r.t. wavelength

../_images/geom-and-mesh-mesh.png

Fig. 9 Exhaust Muffler Mesh. Image credit: Jonathan Hargreaves. Produced using COMSOL Multiphysics™#

Note

I have some cateye geometries & meshes created in Gmsh if we prefer to avoid COMSOL ones?