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Mostrando ítems 31-40 de 62
Artículo
A HLLC scheme for nonconservative hyperbolic problems. Application to turbidity currents with sediment transport.
(Cambridge University Press, 2013)
This paper focuses on the generalization of the HLLC Riemann solver for nonconservative problems. First, the general ideas of the extension of the HLLC solvers for nonconservative systems are discussed. Then, two particular ...
Artículo
A hierarchy of dispersive layer-averaged approximations of Euler equations for free surface flows
(International Press, 2018)
In geophysics, the shallow water model is a good approximation of the incompressible Navier-Stokes system with free surface and it is widely used for its mathematical structure and its computational efficiency. However, ...
Artículo
Discussion on different numerical treatments on the loss of hyperbolicity for the two-layer shallow water system
(Elsevier, 2023)
This paper focus on the numerical approximation of two-layer shallow water system. First, a new approximation of the eigenvalues of the system is proposed, which satisfies some interesting properties. From this approximation, ...
Artículo
Numerical simulations of a dispersive model approximating free-surface Euler equations
(Springer, 2021-10-18)
In some configurations, dispersion effects must be taken into account to improve the simulation of complex fluid flows. A family of free-surface dispersive models has been derived in Fernández-Nieto et al. (Commun Math Sci ...
Artículo
A two-layer shallow flow model with two axes of integration, well-balanced discretization and application to submarine avalanches
(Elsevier, 2020-04-01)
We propose a two-layer model with two different axes of integration and a well-balanced finite volume method. The purpose is to study submarine avalanches and generated tsunamis by a depth-averaged model with different ...
Artículo
Multilayer shallow model for dry granular flows with a weakly non-hydrostatic pressure
(Springer, 2023)
The multilayer model proposed in this paper is a generalization of the multilayer non-hydrostatic model for shallow granular flows (Fernández-Nieto et al in Commun Math Sci 16(5):1169–1202, 2018. https://doi.org/10.4310/ ...
Artículo
Extension of WAF type methods to non-homogeneous Shallow Water Equations with pollutant
(Plenum Press, 2008)
This paper deals with the extension of the WAF method to discretize Shallow Water Equations with pollutants. We consider two different versions of the WAF method, by approximating the intermediate waves using the flux of ...
Artículo
Formal derivation of a bilayer model coupling shallow water and Reynolds lubrication equations: evolution of a thin pollutant layer over water
(Cambridge University Press, 2013)
In this paper a bilayer model is derived to simulate the evolution of a thin film flow over water. This model is derived from the incompressible Navier-Stokes equations together with suitable boundary conditions including ...
Artículo
Efficient numerical schemes for viscoplastic avalanches. Part 1: The 1D case.
(Elsevier, 2014)
This paper deals with the numerical resolution of a shallow water viscoplastic flow model. Viscoplastic materials are characterized by the existence of a yield stress: below a certain critical threshold in the imposed ...
Artículo
A semi-implicit approach for sediment transport models with gravitational effects
(Elsevier, 2022)
In this work efficient semi-implicit methods for sediment bedload transport models with gravitational effects under subcritical regimes is proposed. Several families of models with gravitational effects are presented and ...