COMSOL Multiphysics™

femmesh
Purpose
femmesh
Create a mesh object.
Syntax
Description
fem.mesh = femmesh(p, el)
fem.mesh = femmesh(p, el) creates a mesh object from the mesh data stored in
p and el.
p is an sdim-by-np matrix containing the coordinates of the mesh vertices. The x-,
y-, and z-coordinates are stored in the first, second, and third row, respectively. np
is the number of mesh vertices.
el is a cell array of structures with mesh element information. Each structure stores
information on elements of a specific type.
STRUCTURE
FIELD
type
elem
dom
param
ud
VALUE
one of the strings
vtx | edg | tri |
quad | tet | prism
| hex
matrix of size
nNodes-by-nElem
matrix of size
1-by-nElem
matrix of size
nParam-by-nElem
matrix of size
2-by-nElem
DESCRIPTION
Element type. The valid element types are:
vertex element (vtx), edge element (edg),
triangular element (tri), quadrilateral
element (quad), tetrahedral element (tet),
prism element (prism), and hexahedral
element (hex).
Mesh vertex indices for the element points.
nElem is the number of elements and
nNodes is the number of element points.
Geometry domain numbers.
Geometry parameter values.
Up- and down-side subdomain numbers.
The first row contains the up-side
subdomain numbers and the second row the
down-side subdomain numbers.
The field param is only valid for elements of dimension 1, that is, edge elements, in
2D and 3D, and for elements of dimension 2, that is, triangular or quadrilateral
elements, in 3D. For each edge element, the first and second row contain the
starting and ending parameter value, respectively, in 2D, and starting and ending arc
length value, respectively, in 3D. For each triangular and quadrilateral element, the
rows contain the first and second parameter values for each element corner.
The field ud is only valid for elements of dimension sdim−1, also referred to as
boundary elements. The direction of the normal vector of a boundary element
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