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, which 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.

• pylithapp.problem.bc Boundary condition parameters common aomong the simulations in this directory.

These static and quasistatic simulations solve the elasticity equation. We use the default solution field (displacement); we will override this for the simulations with a fault.

We use the same material properties for several simulations in this directory, so we specify them in pylithapp.cfg to avoid repeating the information in the file with parameters for each simulation. We use a SimpleDB spatial database so that we can simply use a different spatial database file when we change the bulk rheology. Similarly, for all of the simulations in this directory we use Dirichlet (displacement) boundary conditions on the +x, -x, and -y boundaries that constrain the displacement component perpendicular to the fault.