Solute transport and absorption in porous media

Detalhes bibliográficos
Autor(a) principal: Ramos, José Miguel Condeço
Data de Publicação: 2022
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Texto Completo: http://hdl.handle.net/10451/55530
Resumo: Tese de Mestrado Integrado, Engenharia Física , 2022, Universidade de Lisboa, Faculdade de Ciências
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spelling Solute transport and absorption in porous mediaLattice BolztmannMeios porososDispersãoAbsorção de solutoTeses de mestrado - 2022Domínio/Área Científica::Ciências Naturais::Ciências FísicasTese de Mestrado Integrado, Engenharia Física , 2022, Universidade de Lisboa, Faculdade de CiênciasThe transport of a solute in a solvent is an advection-diffusion problem that is widespread in both nature and industry. Many porous materials, such as soils and rocks, are intrinsically disordered at the pore scale which results in complex flow patterns. In this work, the dynamics of the fluid and solute was simulated using the lattice-Boltzmann method (LBM) to investigate how solute dispersion and absorption are affected by the porous medium properties. We simulate systems with circular obstacles to represent the pore scale and obtain the macroscopic source term for different microscopic properties. We validated our code for advection, diffusion, and absorption in porous media. First, we validated the model for the dispersion in a Poiseille flow by confirming that the theoretical prediction between the effective diffusion and Peclet number holds true in our simulations. Similarly, we simulated the solute dispersion in a ´ regular grid of circular objects to analyze the relationship between these two quantities. Additionally, we considered a system with no advection, only diffusion and absorption at a constant rate our results were according with the theoretical expectation and we verified that the relative error becomes smaller for larger obstacles (finer discretization). We also studied a regular porous medium with and without saturation for advection, diffusion, and absorption. In systems with saturation, we found out that the solute concentration decays exponentially while in the case of constant absorption, solute concentrations decrease linearly. For the same conditions we also discovered that the amount of solute lost per obstacle is constant for systems without saturation, whereas the proportion of solute lost is not. We found that the exponential decay of the concentration as a function of distance in disordered porous media is similar to that of regular porous media with the same simulation parameters.Araújo, Nuno Miguel Azevedo Machado deCoelho, Rodrigo Carlos VianaRepositório da Universidade de LisboaRamos, José Miguel Condeço2022-12-28T14:50:25Z202220222022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10451/55530TID:203201914enginfo:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-03-17T14:51:59Zoai:repositorio.ulisboa.pt:10451/55530Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T03:27:06.897230Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Solute transport and absorption in porous media
title Solute transport and absorption in porous media
spellingShingle Solute transport and absorption in porous media
Ramos, José Miguel Condeço
Lattice Bolztmann
Meios porosos
Dispersão
Absorção de soluto
Teses de mestrado - 2022
Domínio/Área Científica::Ciências Naturais::Ciências Físicas
title_short Solute transport and absorption in porous media
title_full Solute transport and absorption in porous media
title_fullStr Solute transport and absorption in porous media
title_full_unstemmed Solute transport and absorption in porous media
title_sort Solute transport and absorption in porous media
author Ramos, José Miguel Condeço
author_facet Ramos, José Miguel Condeço
author_role author
dc.contributor.none.fl_str_mv Araújo, Nuno Miguel Azevedo Machado de
Coelho, Rodrigo Carlos Viana
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Ramos, José Miguel Condeço
dc.subject.por.fl_str_mv Lattice Bolztmann
Meios porosos
Dispersão
Absorção de soluto
Teses de mestrado - 2022
Domínio/Área Científica::Ciências Naturais::Ciências Físicas
topic Lattice Bolztmann
Meios porosos
Dispersão
Absorção de soluto
Teses de mestrado - 2022
Domínio/Área Científica::Ciências Naturais::Ciências Físicas
description Tese de Mestrado Integrado, Engenharia Física , 2022, Universidade de Lisboa, Faculdade de Ciências
publishDate 2022
dc.date.none.fl_str_mv 2022-12-28T14:50:25Z
2022
2022
2022-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10451/55530
TID:203201914
url http://hdl.handle.net/10451/55530
identifier_str_mv TID:203201914
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
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