Geometry and Meshing
Contents
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](../_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](../_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?