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Mostrando ítems 11-20 de 61
Artículo
Non-hydrostatic layer-averaged approximation of Euler system with enhanced dispersion properties
(Springer Nature, 2023)
A new family of non-hydrostatic layer-averaged models for the non-stationary Euler equations is presented in this work, with improved dispersion relations. They are a generalisation of the layer-averaged models introduced ...
Artículo
Numerical treatment of the loss of hyperbolicity of the two-layer shallow-water system
(Plenum Press, 2011)
In this work, a characterization of the hyperbolicity region for the two layer shallow-water system is proposed and checked. Next, some path-conservative finite volume schemes (see [11]) that can be used even if the system ...
Artículo
A second order pvm flux limiter method. Application to magnetohydrodynamics and shallow stratified flows
(Academic Press, 2014)
In this work we propose a second order flux limiter finite volume method, named PVM-2U-FL, that only uses information of the two external waves of the hyperbolic system. This method could be seen as a natural extension of ...
Artículo
An Efficient Two-Layer Non-hydrostatic Approach for Dispersive Water Waves
(Springer, 2019)
In this paper, we propose a two-layer depth-integrated non-hydrostatic system with improved dispersion relations. This improvement is obtained through three free parameters: two of them related to the representation of ...
Artículo
An energetically consistent viscous sedimentation model
(World Scientific Publishing, 2009)
In this paper we consider a two dimensional viscous sedimentation model which is a viscous Shallow-Water system coupled with a di usive equation that describes the evolution of the bottom. For this model, we prove the ...
Artículo
On an Intermediate Field Capturing Riemann solver based on a Parabolic viscosity matrix for the two-layer shallow water system
(Plenum Press, 2011)
The goal of this article is to design a new approximate Riemann solver for the two-layer shallow water system which is fast compared to Roe schemes and accurate compared to Lax-Friedrichs, FORCE, or GFORCE schemes ...
Artículo
On the influence of the thickness of the sediment moving layer in the definition of the bedload transport formula in Exner systems
(Elsevier, 2014)
In this paper we study Exner system and introduce a modified general definition for bedload transport flux. The new formulation has the advantage of taking into account the thickness of the sediment layer which avoids mass ...
Artículo
A multilayer shallow model for dry granular ows with the (I)-rheology: application to granular collapse on erodible beds
(Cambridge University Press, 2016)
In this work we present a multilayer shallow model to approximate the Navier–Stokes equations with the μ(I)μ(I)-rheology through an asymptotic analysis. The main advantages of this approximation are (i) the low cost ...
Artículo
A Weakly Non-hydrostatic Shallow Model for Dry Granular Flows
(Springer, 2021)
A non-hydrostatic depth-averaged model for dry granular flows is proposed, taking into account vertical acceleration. A variable friction coefficient based on the μ(I) rheology is considered. The model is obtained from ...
Artículo
An MPI-CUDA implementation of an improved Roe method for two-layer shallow water systems
(Elsevier, 2012)
The numerical solution of two-layer shallow water systems is required to simulate accurately stratified fluids, which are ubiquitous in nature: they appear in atmospheric flows, ocean currents, oil spills, . . . Moreover, ...