Adding a problem
The easiest way to add a problem is to copy an existing problem setup in the solver you wish to use (in its problems/ sub-directory). Three different files will need to be copied (created):
problem.py: this is the main initialization routine. The function
init_data()is called at runtime by the
initialize()method. Two arguments are passed in, the simulation’s
CellCenterData2dobject and the
RuntimeParametersobject. The job of
init_data()is to fill all of the variables defined in the
_problem.defaults: this contains the runtime parameters and their defaults for your problem. They should be placed in a block with the heading
problemis your problem’s name). Anything listed here will be available through the
RuntimeParametersobject at runtime.
inputs.problem: this is the inputs file that is used at runtime to set the parameters for your problem. Any of the general parameters (like the grid size, boundary conditions, etc.) as well as the problem-specific parameters can be set here. Once the problem is defined, you need to add the problem name to the
__all__list in the
__init__.pyfile in the
problems/sub-directory. This lets python know about the problem.