COMSOL Multiphysics™

femlin
TABLE 1-25: VALID PROPERTY/VALUE PAIRS
PROPERTY
NAME
PROPERTY VALUE DEFAULT DESCRIPTION
Pinitstep positive real Initial stepsize for
parameter
Plist real vector List of parameter values
Pmaxstep positive real Maximum stepsize for
parameter
Pminstep positive real Minimum stepsize for
parameter
Pname string Name of parameter
Porder 0 0 Predictor order for
parameter stepping
Stopcond
string with
expression
Stop parameter stepping
before expression
become negative
In addition, the properties described in the entry femsolver are supported.
The parametric solver properties Oldcomp, Pinitstep, Plist, Pmaxstep,
Pminstep, Pname, Porder, and Stopcond are described under femnlin.
The property In explicitly provides assembled matrices. Its value is a cell array with
alternating matrix names and matrix values. The allowed matrix names are K, L, M,
N, D, and E.
The property Out explicitly sets output variables and their order. The output
variable fem means the FEM structure with the solution object fem.sol added. The
outputs sol, u, and plist are the solution object, the solution matrix (sol.u), and
the parameter list (sol.plist), respectively. The output value stop is 0 if a
complete solution was returned, 1 if a partial solution was returned, and 2 if no
solution was returned. The output solcompdof is a vector containing the indices of
the degrees of freedom solved for. The output matrix Kc and the vector Lc are the
matrix and right-hand side of the linear system after constraint handling, see
“Constraint Handling” on page 441 of the COMSOL Multiphysics User’s Guide.
The matrices Dc and Ec are the corresponding damping matrix and mass matrix after
constraint handling for an eigenvalue or time-dependent problem. The outputs
Null and ud are related to the eliminate constraint handling method. The outputs
Nnp and uscale are the number of degrees of freedom solved for and the scale
factors used in the rescaling of the degrees of freedom, see “Scaling of Variables and
Equations” on page 440 in the COMSOL Multiphysics User’s Guide. The outputs
126 | CHAPTER 1: COMMAND REFERENCE