Direct simulation of interface dynamics: linking capillary pressure, interfacial area and surface energy

Détails

ID Serval
serval:BIB_84376471B0E8
Type
Actes de conférence (partie): contribution originale à la littérature scientifique, publiée à l'occasion de conférences scientifiques, dans un ouvrage de compte-rendu (proceedings), ou dans l'édition spéciale d'un journal reconnu (conference proceedings).
Collection
Publications
Titre
Direct simulation of interface dynamics: linking capillary pressure, interfacial area and surface energy
Titre de la conférence
Computational Methods in Water Resources
Auteur(s)
Ferrari A., Lunati I.
Organisation
XIX International Conference on Water Resources, Illinois, United States of America
Statut éditorial
Publié
Date de publication
2012
Pages
8
Langue
anglais
Notes
Ferrari2012
Résumé
We perform direct numerical simulations of drainage by solving Navier-
Stokes equations in the pore space and employing the Volume Of Fluid
(VOF) method
to track the evolution of the fluid-fluid interface. After demonstrating
that the method
is able to deal with large viscosity contrasts and to model the transition
from stable
flow to viscous fingering, we focus on the definition of macroscopic
capillary pressure.
When the fluids are at rest, the difference between inlet and outlet
pressures and the difference between the intrinsic phase average
pressure coincide with the capillary pressure.
However, when the fluids are in motion these quantities are dominated
by viscous forces.
In this case, only a definition based on the variation of the interfacial
energy provides an
accurate measure of the macroscopic capillary pressure and allows
separating the viscous
from the capillary pressure components.
Mots-clé
Pore-Scale modeling, multiphase flow in porous media, Navier-Stokes, simulations, Volume Of Fluid (VOF) method,
Création de la notice
25/11/2013 16:30
Dernière modification de la notice
03/03/2018 18:54
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