A Pseudo-viscosity Scheme With Supercritical
Approach For Dam-break Wave Routing
Author(s)
F.C.B. Mascarenhas, J.C.C. Amorinf & M.C. Prates
Abstract
In this work it is proposed a finite-difference numerical scheme, valid for
supercritical flows, with the introduction of pseudo-viscosity to avoid numerical
oscillations in the solution of dam-break wave routing. In order to keep the
computed variable values under control, the pseudo-viscosity method is
introduced by two ways: through abrupt variations on the Manning roughness
coefficient, for each discrete time step, as well for each simulated section, and
through local head loss. Since the flow is considered supercritical it is sufficient
to prescribe the boundary conditions at the upstream limit, in this case the dam,
that is subjected to a hypothetical almost instantaneous failure. The case study is
the Funil dam, located at the Paraiba do
Keywords
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