Zobrazeno 1 - 10
of 194
pro vyhledávání: '"Valiani, Alessandro"'
Publikováno v:
Journal of Computational Physics, 464 (2022), 111364
A noteworthy aspect in blood flow modeling is the definition of the mechanical interaction between the fluid flow and the biological structure that contains it, namely the vessel wall. It has been demonstrated that the addition of a viscous contribut
Externí odkaz:
http://arxiv.org/abs/2101.12614
Publikováno v:
J. Comput. Phys. 430 (2021) 110102
This work aims at identifying and quantifying uncertainties related to elastic and viscoelastic parameters, which characterize the arterial wall behavior, in one-dimensional modeling of the human arterial hemodynamics. The chosen uncertain parameters
Externí odkaz:
http://arxiv.org/abs/2007.01907
Publikováno v:
Applied Mathematical Modelling (2016), 40 (17-18), pp. 7516-7531
In this work, using a unified framework consisting of third-order accurate discontinuous Galerkin schemes, we perform a comparison between five different numerical approaches to the free-surface shallow flow simulation on bottom steps. Together with
Externí odkaz:
http://arxiv.org/abs/1912.07238
Publikováno v:
Journal of Hydraulic Research (2019), 57 (5), pp. 662-674
The solution of an extended Riemann problem is used to provide the internal boundary conditions at a junction when simulating one-dimensional flow through an open channel network. The proposed approach, compared to classic junction models, does not r
Externí odkaz:
http://arxiv.org/abs/1912.06573
Autor:
Valiani, Alessandro, Caleffi, Valerio
Publikováno v:
Journal of Hydraulic Engineering (2016), 142 (4), art. no. 06015025-1
Free surface, axially symmetric shallow flow is analysed in both the centrifugal and centripetal directions. Referring to the inviscid steady flow over a flat plate characterised by a unique value of specific energy, the analytical sub- and supercrit
Externí odkaz:
http://arxiv.org/abs/1912.06458
Autor:
Valiani, Alessandro, Caleffi, Valerio
Publikováno v:
Advances in Water Resources (2017), 100, pp. 1-13
This work investigates the topical problem of balancing the shallow water equations over the bottom steps of different heights. The current approaches in the literature are essentially based on mathematical analysis of the hyperbolic system of balanc
Externí odkaz:
http://arxiv.org/abs/1912.05465
Autor:
Carraro, Francesco, Vanzo, Davide, Caleffi, Valerio, Valiani, Alessandro, Siviglia, Annunziato
Publikováno v:
Advances in Water Resources (2018), 117, pp. 40-52
Morphological accelerators, such as the MORFAC (MORphological acceleration FACtor) approach, are widely adopted techniques for the acceleration of the bed evolution, which reduces the computational cost of morphodynamic numerical simulations. In this
Externí odkaz:
http://arxiv.org/abs/1912.05245
Autor:
Valiani, Alessandro, Caleffi, Valerio
Publikováno v:
Advances in Water Resources (2019), 132, art. no. 103389
The classic Stoker dam-break problem is revisited in cases of different channel widths upstream and downstream of the dam. The channel is supposed to have a rectangular cross section and a horizontal and frictionless bottom. The system of the shallow
Externí odkaz:
http://arxiv.org/abs/1912.05225
Autor:
Caleffi, Valerio, Valiani, Alessandro
Publikováno v:
Journal of Computational Physics (2017), 342, pp. 85-116
In this work, the exact reproduction of a moving-water steady flow via the numerical solution of the one-dimensional shallow water equations is studied. A new scheme based on a modified version of the HLLEM approximate Riemann solver [Dumbser M. and
Externí odkaz:
http://arxiv.org/abs/1912.04829
Publikováno v:
Advances in Water Resources (2018), 113, pp. 189-201
Within the framework of the de Saint Venant equations coupled with the Exner equation for morphodynamic evolution, this work presents a new efficient implementation of the Dumbser-Osher-Toro (DOT) scheme for non-conservative problems. The DOT path-co
Externí odkaz:
http://arxiv.org/abs/1912.04791