Dam-break reflection

Summary The unsteady reflection of dam-break flow along a horizontal channel by remote barrier is modelled using the nonlinear shallow water equations. interaction generates an upstream moving bore that connects collapsing reservoir fluid to rapidly deepening layer adjacent barrier. These motions are modified when released into containing pre-wetted layer, because oncoming itself headed alters initial reflection. Solutions for these flows calculated quasi-analytical techniques utilise method characteristics and hodograph transformation governing equations, results validated comparison with direct numerical integration analytical solutions enable precise identification dynamical features in flow, including onset development discontinuous manifest as bores, well their long term behaviour, rate at which energy dissipated, generated from release finite reservoir, maximum depth