# 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

## Mesh#

Approximate version of geometry

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

Elements should be small w.r.t. wavelength

Note

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