Title :

Modeling and Simulation of Mixture Flows :Application to Powder-Snow Avalanches

Author(s) :

Calgaro, Caterina [Auteur]
Laboratoire Paul Painlevé - UMR 8524 [LPP]
Quantitative methods for stochastic models in physics [MEPHYSTO]
Creusé, Emmanuel [Auteur]
Quantitative methods for stochastic models in physics [MEPHYSTO]
Laboratoire Paul Painlevé - UMR 8524 [LPP]
Goudon, Thierry [Auteur]
COmplex Flows For Energy and Environment [COFFEE]
Laboratoire Jean Alexandre Dieudonné [LJAD]

Journal title :

Computers and Fluids

Pages :

100-122

Publisher :

Elsevier

Publication date :

2015

ISSN :

0045-7930

English keyword(s) :

Finite Volume method
Finite Element method
Unstructured meshes
Particulate flows and hydrodynamic regimes
Mixture flows
Variable density flows

HAL domain(s) :

Mathématiques [math]/Equations aux dérivées partielles [math.AP]
Mathématiques [math]
Sciences de l'ingénieur [physics]

English abstract : [en]

We are concerned with the numerical simulation of certain multi-fluids flows, which in particular arise in the modeling of powder-snow avalanches. The behavior of the mixture isdescribed through a single mass density and ...
Show more >We are concerned with the numerical simulation of certain multi-fluids flows, which in particular arise in the modeling of powder-snow avalanches. The behavior of the mixture isdescribed through a single mass density and a velocity field, with an unusual constraint thatrelates the divergence of the velocity to derivatives of the density. We discuss a derivation ofthe model from a Eulerian-Lagrangian description of the mixture. We propose a numericalscheme based on a hybrid Finite Volume/Finite Element method. This approach is validatedby comparison to analytical solutions, numerical solutions and experimental data. The schemeworks on unstructured meshes and it can be advantageously coupled to mesh refnementsstrategies in order to follow fronts of high density variation. We explore numerically therole of the leading coeffcients that characterize the flow: the Froude, the Reynolds and theSchmidt numbers.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire Paul Painlevé - UMR 8524

Source :

Harvested from HAL