Common Information

In addition to the finite-element mesh, PyLith requires files to specify the simulation parameters. We specify parameters common to all simulations in a directory in pylithapp.cfg. This limits duplicate information in the parameter files for each simulation. The pylithapp.cfg file contains numerous comments, so we only summarize the parameters here.

The settings contained in pylithapp.cfg for this problem consist of:

• pylithapp.metadata Metadata common to all of the simulations in the directory.

• pylithapp.journal.info Parameters that control the verbosity of the output written to stdout for the different components.

• pylithapp.mesh_generator Parameters for importing the finite-element mesh.

• pylithapp.problem Parameters that define the boundary value problem and it solution, such as the type of solver, solution fields.

• pylithapp.problem.materials Paramters that specify the governing equation and bulk rheologies.

The physical properties for each material are specified in a spatial database. In this case we have only one material and the material properties are uniform, so we use a single UniformDB to specify the material properties in pylithapp.cfg. When we have a spatial variation in the material properties, we specify them in a spatial database file.