COMSOL Multiphysics™

femsol
Purpose
femsol
Create a solution object.
Syntax
fem.sol = femsol(u)
fem.sol = femsol(u,'tlist',tlist)
fem.sol = femsol({u ut},'tlist',tlist)
fem.sol = femsol(u,'plist',plist,'pname',plist)
fem.sol = femsol(u,'lambda',lambda)
Description fem.sol = femsol(u) creates a stationary solution object from a column vector u.
The length of u must equal number of degrees of freedoms in the extended mesh
object, fem.xmesh, (see flngdof).
fem.sol = femsol(u,...) stores a matrix corresponding to a time-dependent,
parametric, or eigenvalue solution in the solution object. The number of rows must
equal the number of degrees of freedoms in the extended mesh object, fem.xmesh,
(see flngdof) and the number of columns of u must equal the number of time
steps, parameter values, or eigenvalues, respectively.
fem.sol = femsol({u ut},...) creates a time-dependent solution object
containing also the first time derivative. The matrix u is the usual solution matrix,
and ut is its time derivative.
fem.sol = femsol(u,'mcase',mcase) sets the mesh case of the created solution
object to mcase. The default mesh case is 0.
Access Functions
The following access functions lets you fetch properties from the solution object.
TABLE 1-29: VALID PROPERTY/VALUE PAIRS
PROPERTY
fem.sol.u
fem.sol.ut
fem.sol.tlist
fem.sol.plist
fem.sol.pname
fem.sol.lambda
fem.sol.mcase
VALUES
Solution vector or matrix
Matrix containing time derivative (time-dependent
solutions)
List of time steps (time-dependent solutions)
List of parameter values (parametric solutions)
Parameter name (parametric solutions)
List of eigenvalues (eigenvalue solutions)
Mesh case
If the time-derivatives have not been stored in the femsol object, fem.sol.ut is
computed as the slope of the linear interpolation between the time steps. To store
the time derivatives in the solution, use the Outcomp property, see femsolver.
146 | CHAPTER 1: COMMAND REFERENCE