Introduction
There is frequently a need to have a faster way to generate a steady free-surface flow than by simply trying to compute the asymptotic state of a transient flow. The situation is similar to solving for incompressible flow by trying to use a compressible flow solver. In the latter case, compression waves can take an extremely long time to decay and leave a resultant “incompressible” flow. Correspondingly, in free-surface flows the fluid is incompressible, but surface waves may require a very long time to damp out to produce a steady surface configuration.