COMSOL Multiphysics™

multiphysics
which domain group in appl.XXX.shape to inherit from, the first appropriate
group is used.
The field fem.appl.xxx.usage are ind-based cell arrays of ones and zeros
indicating domain group usage. Wherever a zero entry exists, the information in
appl.xxx.shape is ignored when forming fem.xxx.shape.
The fields appl.XXX.gporder and appl.xxx.gporder indicate the order of
quadrature formula to use in the different domain groups. In fully expanded form
it is a cell array where each element is a cell array (of positive integers) of length
equal to the number of dependent variables (excluding submode variables) in this
mode. Defaulting and inheritance can be induced by using 0. The inherited order is
the maximum order used in the objects from the XXX level in contact with the group
at the xxx level. Where different elements within a domain group would inherit
different orders, some domain group splitting takes place. This field is not present
in the appl.pnt field.
The fields appl.XXX.cporder and appl.xxx.cporder indicate domain group
constraints discretization order. Behaves exactly as gporder.
The fields appl.XXX.init indicate domain group initial conditions. For format see
asseminit.
appl.var contains the application scalar variables. The default is obtained from the
application mode for physics modes.
The composite system is created by appending the subsystems in the order they are
specified in fem.appl. The affected fields in the fem1 structure are dim, form, equ,
bnd, edg, pnt, var, elemmph, eleminitmph, shape, sshape and border. All the
other fields in fem are copied to fem1. In the description below the notation *** is
used to represent any or all of the fields equ, bnd, edg and/or pnt.
The dim field of the composite system, fem1.dim, is a cell array of the dependent
variable names:
fem1.dim={fem.appl{1}.dim{:}, fem.appl{2}.dim{:}, ...}
The default names ('u1', 'u2', ...) Are used for subsystems with integer dim fields
and no mode field.
The form of each subsystem may be converted by using flform, in the direction
'coefficient' -> 'general' -> 'weak'. The default form of the composite
system, fem1.form, is the first form which all the subsystems may attain, possibly
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