COMSOL Multiphysics™

elmesh
Purpose
elmesh
Define mesh variables and a frame.
Syntax
Description
Examples
el.elem = 'elmesh'
el.g{ig} = geomnum
el.frame = frame
el.xvars = 'on' | 'off'
el.geomdim{ig}{edim}.ind{eldomgrp} = domainlist
el.geomdim{ig}{edim}.sizename{eldomgrp} = sname
el.geomdim{ig}{edim}.qualname{eldomgrp} = qname
el.geomdim{ig}{edim}.dvolname{eldomgrp} = dvolname
el.geomdim{ig}{edim}.sshape{eldomgrp} = sshape
sshape{2*i-1} = bmtypename
sshape{2*i} = params
params.type = 'fixed' | 'moving_abs' | 'moving_rel' | 'moving_expr'
params.sorder = sorder
params.sdimdofs{idim} = dofname
params.sdimexprs{idim} = expr
params.refframe = refframename
Concerning the syntax of the ind field, see elempty. For each domain group, the
elmesh element defines the variable names sname, qname, and dvolname which
evaluate to local mesh element size, element quality, and element volume,
respectively. Also, if xvars='on' the space coordinates, the space coordinate’s
reference time derivative, and the normal vector are defined. These variable names
are derived from the space coordinates of the frame frame. The type of frame is
determined by sshape.
By default, the mesh size variable h is available only on the top dimension. If
evaluated on a boundary, h returns the size of the adjacent subdomain element. An
additional elmesh element can be used to define h on the boundary to represent the
size of the boundary element.
el.elem = 'elmesh';
el.g = {'1'};
el.frame = 'xy'
el.xvars = 'off'
gd.sizename = 'h';
el.geomdim{1} = {{},gd,{}};
fem.elem = [fem.elem {el}];
See Also
elempty
96 | CHAPTER 1: COMMAND REFERENCE