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transition compartment.
Alternating Solutions of the Strong and Weak Systems
Since the RSW system consists of weak and strong systems that are coupled at the
transition location, it may be possible to efficiently solve (4.22) in a two-step process.
The first step is to solve for the weak state variables, using the strong voltage variables
as inputs. At the next time-step, we solve for the strong state variables, using the
weak voltage variables as inputs. The process is then repeated, so that we alternate
solving the strong and weak systems independently. In this way the system would
likely be less accurate, but would also be faster, and so perhaps this speed gain would
permit using a smaller time-step, which could then recover the lost accuracy.