نتایج جستجو برای: shallow water model

تعداد نتایج: 2595951  

2011
Weiming Wu Alejandro Sánchez Mingliang Zhang

WU, W.; SANCHEZ, A., and ZHANG, M., 2011. An Implicit 2-D Shallow Water Flow Model on Unstructured Quadtree Rectangular Mesh. In: Roberts, T.M., Rosati, J.D., and Wang, P. (eds.), Proceedings, Symposium to Honor Dr. Nicholas C. Kraus, Journal of Coastal Research, Special Issue, No. 59, pp. 15-26. West Palm Beach (Florida), ISSN 0749-0208. An implicit finite volume scheme is developed to solve t...

Journal: :Advances in Engineering Software 2007
Manuel Jesús Castro Díaz José A. García-Rodríguez José M. González-Vida Jorge Macías Sánchez Carlos Parés Madroñal

This paper deals with the numerical simulation of flows of stratified fluids through channels with irregular geometry. Channel crosssections are supposed to be symmetric but not necessarily rectangular. The fluid is supposed to be composed of two shallow layers of immiscible fluids of constant densities, and the flow is assumed to be one-dimensional. Therefore, the equations to be solved are a ...

2017
Jun Zhang Bertrand Gottin Antonia Papandreou-Suppappola Cornel Ioana

When the ocean seabed is considered to be rigid, the ideal waveguide model can be used to model the shallow water environment. However, a more realistic ocean waveguide model treats the ocean floor as a boundary between two different fluid media. In this paper, a frequency-domain characterization of shallow water environments is proposed based on this realistic waveguide model with a fluid boun...

2015
Marie-Odile Bristeau Anne Mangeney Jacques Sainte-Marie Nicolas Seguin Benoit Perthame

In this paper, we present an original derivation process of a nonhydrostatic shallow water-type model which aims at approximating the incompressible Euler and Navier-Stokes systems with free surface. The closure relations are obtained by a minimal energy constraint instead of an asymptotic expansion. The model slightly differs from the well-known Green-Naghdi model and is confronted with statio...

2013
E. Alekseenko

The paper addresses the application of the nonlinear hydrodynamics model (RANS (Reynolds-averaged Navier–Stokes) equations) in a wide semi-enclosed Mediterranean lagoon (Berre lagoon), considering three natural forcing functions, i.e., sea tide propagating through a long narrow channel, wind and runoff. Main attention is focused to characteristic velocities (at free surface and bottom) and to f...

2017
Bernard Di Martino Catherine Giacomoni Jean-Martin Paoli Pierre Simonnet Jean Martin Paoli

In this paper we propose a numerical method to solve the Cauchy problem based on the viscous shallow water equations in an horizontally moving domain. More precisely, we are interested in a flooding and drying model, used to modelize the overflow of a river or the intrusion of a tsunami on ground. We use a non conservative form of the two-dimensional shallow water equations, in eight velocity f...

2006
S. D. Howison J. R. Ockendon

This paper describes how tangential impact velocities can be incorporated into wellknown impact theories in deep and shallow water. Taking the deep and shallow flows in turn, it is shown how to link the normal impact Wagner and Korobkin theories to the tangential impact theories of planing and skimming respectively. An instability is revealed that limits the configurations that can be analysed ...

Journal: :CoRR 2014
Razvan Stefanescu Adrian Sandu Ionel Michael Navon

This paper introduces tensorial calculus techniques in the framework of Proper Orthogonal Decomposition (POD) to reduce the computational complexity of the reduced nonlinear terms. The resulting method, named tensorial POD, can be applied to polynomial nonlinearities of any degree p. Such nonlinear terms have an on-line complexity of O(k), where k is the dimension of POD basis, and therefore is...

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