donnaaboise
commented
6 years ago The time step 'dt' is not passed to bc2 in clawpack 5.0 or amrclaw 5.0, so only passed in Clawpack 4.6. Still not clear why someone would use dt in bc2, but in ForestClaw, we set this to 1e99, and don't allow the user to set it.
If the boundary condition is obtained via a solution to an ODE, the time stepping should be done in b4step2, not in bc2. The reason is that the physical boundary conditions are called multiple times, and this will screw up the time stepping.