An energy-consistent depth-averaged Euler system: derivation and   properties
  In this paper, we present an original derivation process of a non-hydrostatic shallow water-type model which aims at approximating the incompressible Euler and Navier-Stokes systems with free surface. The closure relations are obtained by aminimal energy constraint instead of an asymptotic expansion. The model slightly differs from thewell-known Green-Naghdi model and is confronted with stationary andanalytical solutions of the Euler system corresponding to rotationalflows. At the end of the paper, we givetime-dependent analytical solutions for the Euler system that are alsoanalytical solutions for the proposed model but that are not solutionsof the Green-Naghdi model. We also give and compare analytical solutions of thetwo non-hydrostatic shallow water models. 
Marie-Odile Bristeau (ANGE), Anne Mangeney (ANGE, IPGP), Jacques   Sainte-Marie (ANGE, LJLL, CEREMA), Nicolas Seguin (ANGE, ...
math.NA