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SUBROUTINE BEARStep

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Description

This subroutine advances the the simulation through time. A rough outline of this process is as follows:

1. Set the initial timesteps.

2. Call the AMR() function to integrate grids over dt.

3. Advance the time by one step (t = t + dt).

4. If the timestep is variable, then recalculate the timestep.

5. Repeat steps 2 - 4 until t > tend (the end of the simulation time).

INCLUDES:

None.

USES:

• nodeinfodef.f90 supplies the NodeInfo data structure and some functions that operate on it.
• treeops.f90 supplies the Node and Forest structures and accompanying methods, as well as the ApplyOn_ functions.
• mpi_exec.f90 supplies functions used to set up distributed processing (most of which tend to have MPI_ somewhere in the name).
• serial_exec.f90 supplies functions used for single-processor processing.
• beario.f90 provides some file IO functions.
• scheme module supplies time-stepping scheme.
• contrib/astro/problem.f90 Contains problem-specific variables and functions.