High-resolution shock-capturing numerical simulations of three-phase immiscible fluids from the unsaturated to the saturated zone

Abstract Numerical modeling of immiscible contaminant fluid flow in unsaturated and saturated porous aquifers is of great importance in many scientific fields to properly manage groundwater resources. We present a high-resolution numerical model that simulates three-phase immiscible fluid flow in bo...

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Autores principales:	Alessandra Feo, Fulvio Celico
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9ef3a9614d0e49ccad2cf2ee38c37afe
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spelling	oai:doaj.org-article:9ef3a9614d0e49ccad2cf2ee38c37afe2021-12-02T13:34:51ZHigh-resolution shock-capturing numerical simulations of three-phase immiscible fluids from the unsaturated to the saturated zone10.1038/s41598-021-83956-w2045-2322https://doaj.org/article/9ef3a9614d0e49ccad2cf2ee38c37afe2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83956-whttps://doaj.org/toc/2045-2322Abstract Numerical modeling of immiscible contaminant fluid flow in unsaturated and saturated porous aquifers is of great importance in many scientific fields to properly manage groundwater resources. We present a high-resolution numerical model that simulates three-phase immiscible fluid flow in both unsaturated and saturated zone in a porous aquifer. We use coupled conserved mass equations for each phase and study the dynamics of a multiphase fluid flow as a function of saturation, capillary pressure, permeability, and porosity of the different phases, initial and boundary conditions. To deal with the sharp front originated from the partial differential equations’ nonlinearity and accurately propagate the sharp front of the fluid component, we use a high-resolution shock-capturing method to treat discontinuities due to capillary pressure and permeabilities that depend on the saturation of the three different phases. The main approach to the problem’s numerical solution is based on (full) explicit evolution of the discretized (in-space) variables. Since explicit methods require the time step to be sufficiently small, this condition is very restrictive, particularly for long-time integrations. With the increased computational speed and capacity of today’s multicore computer, it is possible to simulate in detail contaminants’ fate flow using high-performance computing.Alessandra FeoFulvio CelicoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alessandra Feo Fulvio Celico High-resolution shock-capturing numerical simulations of three-phase immiscible fluids from the unsaturated to the saturated zone
description	Abstract Numerical modeling of immiscible contaminant fluid flow in unsaturated and saturated porous aquifers is of great importance in many scientific fields to properly manage groundwater resources. We present a high-resolution numerical model that simulates three-phase immiscible fluid flow in both unsaturated and saturated zone in a porous aquifer. We use coupled conserved mass equations for each phase and study the dynamics of a multiphase fluid flow as a function of saturation, capillary pressure, permeability, and porosity of the different phases, initial and boundary conditions. To deal with the sharp front originated from the partial differential equations’ nonlinearity and accurately propagate the sharp front of the fluid component, we use a high-resolution shock-capturing method to treat discontinuities due to capillary pressure and permeabilities that depend on the saturation of the three different phases. The main approach to the problem’s numerical solution is based on (full) explicit evolution of the discretized (in-space) variables. Since explicit methods require the time step to be sufficiently small, this condition is very restrictive, particularly for long-time integrations. With the increased computational speed and capacity of today’s multicore computer, it is possible to simulate in detail contaminants’ fate flow using high-performance computing.
format	article
author	Alessandra Feo Fulvio Celico
author_facet	Alessandra Feo Fulvio Celico
author_sort	Alessandra Feo
title	High-resolution shock-capturing numerical simulations of three-phase immiscible fluids from the unsaturated to the saturated zone
title_short	High-resolution shock-capturing numerical simulations of three-phase immiscible fluids from the unsaturated to the saturated zone
title_full	High-resolution shock-capturing numerical simulations of three-phase immiscible fluids from the unsaturated to the saturated zone
title_fullStr	High-resolution shock-capturing numerical simulations of three-phase immiscible fluids from the unsaturated to the saturated zone
title_full_unstemmed	High-resolution shock-capturing numerical simulations of three-phase immiscible fluids from the unsaturated to the saturated zone
title_sort	high-resolution shock-capturing numerical simulations of three-phase immiscible fluids from the unsaturated to the saturated zone
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9ef3a9614d0e49ccad2cf2ee38c37afe
work_keys_str_mv	AT alessandrafeo highresolutionshockcapturingnumericalsimulationsofthreephaseimmisciblefluidsfromtheunsaturatedtothesaturatedzone AT fulviocelico highresolutionshockcapturingnumericalsimulationsofthreephaseimmisciblefluidsfromtheunsaturatedtothesaturatedzone
_version_	1718392752450830336

High-resolution shock-capturing numerical simulations of three-phase immiscible fluids from the unsaturated to the saturated zone

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