Stationary transport problem

StationaryProblem	nsteps(in) #
	[renumber(in) #]
	[sparselinsolverparams() #]
	[exportfields() #]
	[atomicfields(in) #]

Stationary transport problem. Series of loading cases is maintained as sequence of time-steps. For each load case an auxiliary time-step is generated with time equal to load case number. Load vectors for each load case are formed as load vectors at this auxiliary time. The sparselinsolverparams parameter describes the sparse linear solver attributes and is explained in section 6.17. Nonzero value of optional parameter renumber turns on the equation renumbering to optimize the profile of characteristic matrix (uses Sloan algorithm). By default, profile optimization is not performed. It will not work in parallel mode.

If the present problem is used within the context of staggered-like analysis, the temperature field obtained by the solution can be exported and made available to any subsequent analyses. For example, temperature field obtained by present analysis can be taken into account in subsequent mechanical analysis. To allow this, the temperate must be ``exported''. This can be done by adding exportfields parameter, followed by atomicfields array. This array contains the atomic field identifiers, which tell the problem to register its primary unknowns under given atomic identifiers. Currently available atomic ids are: Temperature (corresponding value is 1). Then the subsequent analyses can get access to exported fields (via atomic id) and take them into account, if they support such feature.