On the relevance of the dam break problem in the context of nonlinear shallow water equations

Abstract

The classical dam break problem has become the de facto standard in validating the Nonlinear Shallow Water Equations (NSWE) solvers. Moreover, the NSWE are widely used for flooding simulations. While applied mathematics community is essentially focused on developing new numerical schemes, we tried to examine the validity of the mathematical model under consideration. The main purpose of this study is to check the pertinence of the NSWE for flooding processes. From the mathematical point of view, the answer is not obvious since all derivation procedures assumes the total water depth positivity. We performed a comparison between the two-fluid Navier-Stokes simulations and the NSWE solved analytically and numerically. Several conclusions are drawn out and perspectives for future research are outlined.

20 pages, 15 figures. Accepted to Discrete and Continuous Dynamical Systems. Other author's papers can be downloaded at http://www.lama.univ-savoie.fr/~dutykh

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• Theory of weakly damped free-surface flows: a new formulation based on potential flow solutions
• The VOLNA code for the numerical modelling of tsunami waves: generation, propagation and inundation
• Practical use of variational principles for modeling water waves
• Group and phase velocities in the free-surface visco-potential flow: new kind of boundary layer induced instability

Cited by in corpus (3)

• Modified Shallow Water Equations for significantly varying seabeds
• Non-dispersive conservative regularisation of nonlinear shallow water (and isothermal Euler) equations
• Peregrine's system revisited