Publicação
Flow of flexible matter through complex environments
| Resumo: | In this thesis we investigated the flow of flexible particles in complex environments, with a focus on droplet-based emulsions driven by flow and the sedimentation of deformable capsules and droplets in confined geometries. We used the lattice Boltzmann method (LBM) for fluid modelling and employed a combination of intrinsic LB methods and coupling with other techniques to simulate multicomponent droplets and flexible capsules. We conducted a comprehensive review, summarising different approaches utilising LBM in simulating fluid-filled soft structures. We highlight the relevance of these models in fields such as droplet microfluidics, drug delivery, and microparticle synthesis, while categorising the methods into fluid-structure and fluid-fluid methods, which consider interfacial boundaries and hydrodynamic interactions. We emphasise the versatility of the lattice Boltzmann method in handling complex boundary conditions and incorporating physical models. Additionally, we discussed benchmark tests for model validation. In further studies, we extended a multicomponent LB method to 3D geometries and simulated droplets flowing in a wetting channel. The results revealed a discontinuous shear thinning transition as the external force increased. We examined the effect of surface tension, directly related to droplet deformability, demonstrating that higher surface tension led to less deformable droplets and thus require larger forces for shear thinning to occur. In the next study, we looked at the shape transitions of sedimenting capsules and droplets. In the confined regime, we found a transition to bullet shape consistent with experiments. Interestingly, we find that the transition from oblate to bullet shaped droplets and capsules consistently occurs at a specific ratio between the capsule size and confinement, regardless of the flexibility. A detailed analysis of hydrodynamic stresses and forces provides valuable insights into the mechanisms driving these shape transitions. Overall, the application of the lattice Boltzmann method, and the combination of computational and experimental approaches (conducted by the Oppenheimer Group for Soft Matter Physics at Tel Aviv University), sheds light into the dynamics of droplet-based systems and deformable capsules. These findings have implications for a wide range of fields involving soft matter systems, opening up new possibilities for designing and optimising processes in droplet microfluidics, drug delivery, food & cosmetic industry and beyond. |
|---|---|
| Autores principais: | Silva, Danilo |
| Assunto: | fluid dynamics droplets capsules deformation lattice Boltzmann method dinâmica de fluídos gotas cápsulas deformação |
| Ano: | 2024 |
| País: | Portugal |
| Tipo de documento: | tese de doutoramento |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório da Universidade de Lisboa |
| _version_ | 1866810328379031552 |
|---|---|
| author | Silva, Danilo |
| author_facet | Silva, Danilo |
| author_role | author |
| contributor_name_str_mv | Gama, Margarida Telo da Araújo, Nuno Repositório Científico de Acesso Aberto da ULisboa |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Silva, Danilo\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Gama, Margarida Telo da Araújo, Nuno Repositório Científico de Acesso Aberto da ULisboa |
| datacite.creators.creator.creatorName.fl_str_mv | Silva, Danilo |
| datacite.date.Accepted.fl_str_mv | 2024-03-27T00:00:00Z |
| datacite.date.available.fl_str_mv | 2025-02-10T11:36:27Z |
| datacite.date.embargoed.fl_str_mv | 2025-02-10T11:36:27Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | fluid dynamics droplets capsules deformation lattice Boltzmann method dinâmica de fluídos gotas cápsulas deformação |
| datacite.titles.title.fl_str_mv | Flow of flexible matter through complex environments |
| dc.contributor.none.fl_str_mv | Gama, Margarida Telo da Araújo, Nuno Repositório Científico de Acesso Aberto da ULisboa |
| dc.creator.none.fl_str_mv | Silva, Danilo |
| dc.date.Accepted.fl_str_mv | 2024-03-27T00:00:00Z |
| dc.date.available.fl_str_mv | 2025-02-10T11:36:27Z |
| dc.date.embargoed.fl_str_mv | 2025-02-10T11:36:27Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10400.5/98263 |
| dc.language.none.fl_str_mv | eng |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | fluid dynamics droplets capsules deformation lattice Boltzmann method dinâmica de fluídos gotas cápsulas deformação |
| dc.title.fl_str_mv | Flow of flexible matter through complex environments |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_db06 |
| description | In this thesis we investigated the flow of flexible particles in complex environments, with a focus on droplet-based emulsions driven by flow and the sedimentation of deformable capsules and droplets in confined geometries. We used the lattice Boltzmann method (LBM) for fluid modelling and employed a combination of intrinsic LB methods and coupling with other techniques to simulate multicomponent droplets and flexible capsules. We conducted a comprehensive review, summarising different approaches utilising LBM in simulating fluid-filled soft structures. We highlight the relevance of these models in fields such as droplet microfluidics, drug delivery, and microparticle synthesis, while categorising the methods into fluid-structure and fluid-fluid methods, which consider interfacial boundaries and hydrodynamic interactions. We emphasise the versatility of the lattice Boltzmann method in handling complex boundary conditions and incorporating physical models. Additionally, we discussed benchmark tests for model validation. In further studies, we extended a multicomponent LB method to 3D geometries and simulated droplets flowing in a wetting channel. The results revealed a discontinuous shear thinning transition as the external force increased. We examined the effect of surface tension, directly related to droplet deformability, demonstrating that higher surface tension led to less deformable droplets and thus require larger forces for shear thinning to occur. In the next study, we looked at the shape transitions of sedimenting capsules and droplets. In the confined regime, we found a transition to bullet shape consistent with experiments. Interestingly, we find that the transition from oblate to bullet shaped droplets and capsules consistently occurs at a specific ratio between the capsule size and confinement, regardless of the flexibility. A detailed analysis of hydrodynamic stresses and forces provides valuable insights into the mechanisms driving these shape transitions. Overall, the application of the lattice Boltzmann method, and the combination of computational and experimental approaches (conducted by the Oppenheimer Group for Soft Matter Physics at Tel Aviv University), sheds light into the dynamics of droplet-based systems and deformable capsules. These findings have implications for a wide range of fields involving soft matter systems, opening up new possibilities for designing and optimising processes in droplet microfluidics, drug delivery, food & cosmetic industry and beyond. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | doctoralThesis |
| fulltext.url.fl_str_mv | https://repositorio.ulisboa.pt/bitstreams/f5e9d653-5670-4683-802c-2ceb3a305d1b/download |
| funding.funder.alternateName_str_mv | FCT FCT FCT |
| funding.funder.identifier_str_mv | http://doi.org/10.13039/501100001871 http://doi.org/10.13039/501100001871 http://doi.org/10.13039/501100001871 |
| funding.funder.name_str_mv | Fundação para a Ciência e a Tecnologia Fundação para a Ciência e a Tecnologia Fundação para a Ciência e a Tecnologia |
| funding.name_str_mv | OE 6817 - DCRRNI ID 6817 - DCRRNI ID |
| id | ul_83bc47e4d2dec4367e2b95a66f0aa78d |
| identifier.url.fl_str_mv | http://hdl.handle.net/10400.5/98263 |
| instacron_str | ul |
| institution | Universidade de Lisboa |
| instname_str | Universidade de Lisboa |
| language | eng |
| network_acronym_str | ul |
| network_name_str | Repositório da Universidade de Lisboa |
| oai_identifier_str | oai:repositorio.ulisboa.pt:10400.5/98263 |
| organization_str_mv | urn:organizationAcronym:ul |
| person_str_mv | Silva, Danilo Silva, Danilo https://www.ciencia-id.pt/ED18-11DE-B84F ED18-11DE-B84F |
| publishDate | 2024 |
| reponame_str | Repositório da Universidade de Lisboa |
| repository_id_str | urn:repositoryAcronym:ul |
| service_str_mv | urn:repositoryAcronym:ul |
| spelling | engpt_PTIn this thesis we investigated the flow of flexible particles in complex environments, with a focus on droplet-based emulsions driven by flow and the sedimentation of deformable capsules and droplets in confined geometries. We used the lattice Boltzmann method (LBM) for fluid modelling and employed a combination of intrinsic LB methods and coupling with other techniques to simulate multicomponent droplets and flexible capsules. We conducted a comprehensive review, summarising different approaches utilising LBM in simulating fluid-filled soft structures. We highlight the relevance of these models in fields such as droplet microfluidics, drug delivery, and microparticle synthesis, while categorising the methods into fluid-structure and fluid-fluid methods, which consider interfacial boundaries and hydrodynamic interactions. We emphasise the versatility of the lattice Boltzmann method in handling complex boundary conditions and incorporating physical models. Additionally, we discussed benchmark tests for model validation. In further studies, we extended a multicomponent LB method to 3D geometries and simulated droplets flowing in a wetting channel. The results revealed a discontinuous shear thinning transition as the external force increased. We examined the effect of surface tension, directly related to droplet deformability, demonstrating that higher surface tension led to less deformable droplets and thus require larger forces for shear thinning to occur. In the next study, we looked at the shape transitions of sedimenting capsules and droplets. In the confined regime, we found a transition to bullet shape consistent with experiments. Interestingly, we find that the transition from oblate to bullet shaped droplets and capsules consistently occurs at a specific ratio between the capsule size and confinement, regardless of the flexibility. A detailed analysis of hydrodynamic stresses and forces provides valuable insights into the mechanisms driving these shape transitions. Overall, the application of the lattice Boltzmann method, and the combination of computational and experimental approaches (conducted by the Oppenheimer Group for Soft Matter Physics at Tel Aviv University), sheds light into the dynamics of droplet-based systems and deformable capsules. These findings have implications for a wide range of fields involving soft matter systems, opening up new possibilities for designing and optimising processes in droplet microfluidics, drug delivery, food & cosmetic industry and beyond.application/pdfpt_PTFlow of flexible matter through complex environmentsPersonalSilva, DaniloDSpacehttp://dspace.org/items/e7518f61-c967-4168-bcc5-5e40dccba69fDSpacehttp://dspace.org/items/e7518f61-c967-4168-bcc5-5e40dccba69fFortes SilvaDanilo PatricioCiência IDhttps://www.ciencia-id.ptED18-11DE-B84FGama, Margarida Telo daAraújo, NunoHostingInstitutionOrganizationalRepositório Científico de Acesso Aberto da ULisboae-mailmailto:repositorio@reitoria.ulisboa.ptrepositorio@reitoria.ulisboa.ptURNurn:tid:1016378532025-02-10T11:36:27Z2024-03-272023-12-142024-03-27T00:00:00ZHandlehttp://hdl.handle.net/10400.5/98263http://purl.org/coar/access_right/c_abf2open accessfluid dynamicsdropletscapsulesdeformationlattice Boltzmann methoddinâmica de fluídosgotascápsulasdeformação33268140 bytesFundação para a Ciência e a TecnologiaFlow of flexible active matter through complex environmentsOECrossref Funder IDhttp://doi.org/10.13039/501100001871Fundação para a Ciência e a TecnologiaCenter for Theoretical and Computational Physics6817 - DCRRNI IDCrossref Funder IDhttp://doi.org/10.13039/501100001871Fundação para a Ciência e a TecnologiaCenter for Theoretical and Computational Physics6817 - DCRRNI IDCrossref Funder IDhttp://doi.org/10.13039/501100001871literaturehttp://purl.org/coar/resource_type/c_db06doctoral thesishttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorio.ulisboa.pt/bitstreams/f5e9d653-5670-4683-802c-2ceb3a305d1b/download |
| spellingShingle | Flow of flexible matter through complex environments Silva, Danilo fluid dynamics droplets capsules deformation lattice Boltzmann method dinâmica de fluídos gotas cápsulas deformação |
| status | SINGLETON |
| subject.fl_str_mv | fluid dynamics droplets capsules deformation lattice Boltzmann method dinâmica de fluídos gotas cápsulas deformação |
| title | Flow of flexible matter through complex environments |
| title_full | Flow of flexible matter through complex environments |
| title_fullStr | Flow of flexible matter through complex environments |
| title_full_unstemmed | Flow of flexible matter through complex environments |
| title_short | Flow of flexible matter through complex environments |
| title_sort | Flow of flexible matter through complex environments |
| topic | fluid dynamics droplets capsules deformation lattice Boltzmann method dinâmica de fluídos gotas cápsulas deformação |
| topic_facet | fluid dynamics droplets capsules deformation lattice Boltzmann method dinâmica de fluídos gotas cápsulas deformação |
| url | http://hdl.handle.net/10400.5/98263 |
| visible | 1 |