DC FieldValueLanguage
dc.contributor.authorMeier, Christoph-
dc.contributor.authorFuchs, Sebastian Leonhard-
dc.contributor.authorHart, A. John-
dc.contributor.authorWall, Wolfgang A.-
dc.date.accessioned2021-05-04T07:13:18Z-
dc.date.available2021-05-04T07:13:18Z-
dc.date.issued2021-04-20-
dc.identifier.citationComputer Methods in Applied Mechanics and Engineering 381: 113812 (2021-08-01)de_DE
dc.identifier.issn0045-7825de_DE
dc.identifier.urihttp://hdl.handle.net/11420/9426-
dc.description.abstractLaser-based metal processing including welding and three dimensional printing, involves localized melting of solid or granular raw material, surface tension-driven melt flow and significant evaporation of melt due to the applied very high energy densities. The present work proposes a weakly compressible smoothed particle hydrodynamics formulation for thermo-capillary phase change problems involving solid, liquid and gaseous phases with special focus on selective laser melting, an emerging metal additive manufacturing technique. Evaporation-induced recoil pressure, temperature-dependent surface tension and wetting forces are considered as mechanical interface fluxes, while a Gaussian laser beam heat source and evaporation-induced heat losses are considered as thermal interface fluxes. A novel interface stabilization scheme is proposed, which is shown to allow for a stable and smooth liquid–gas interface by effectively damping spurious interface flows as typically occurring in continuum surface force approaches. Moreover, discretization strategies for the tangential projection of the temperature gradient, as required for the discrete Marangoni forces, are critically reviewed. The proposed formulation is deemed especially suitable for modeling of the melt pool dynamics in metal additive manufacturing because the full range of relevant interface forces is considered and the explicit resolution of the atmospheric gas phase enables a consistent description of pore formation by gas inclusion. The accuracy and robustness of the individual model and method building blocks is verified by means of several selected examples in the context of the selective laser melting process.en
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (DFG)de_DE
dc.language.isoende_DE
dc.publisherElsevier Sciencede_DE
dc.relation.ispartofComputer methods in applied mechanics and engineeringde_DE
dc.subjectMelt poolde_DE
dc.subjectMetal additive manufacturingde_DE
dc.subjectPhase changede_DE
dc.subjectSmoothed particle hydrodynamicsde_DE
dc.subjectThermo-capillarityde_DE
dc.subjectTwo-phase flowde_DE
dc.subject.ddc600: Technikde_DE
dc.titleA novel smoothed particle hydrodynamics formulation for thermo-capillary phase change problems with focus on metal additive manufacturing melt pool modelingde_DE
dc.typeArticlede_DE
dc.type.diniarticle-
dcterms.DCMITypeText-
tuhh.abstract.englishLaser-based metal processing including welding and three dimensional printing, involves localized melting of solid or granular raw material, surface tension-driven melt flow and significant evaporation of melt due to the applied very high energy densities. The present work proposes a weakly compressible smoothed particle hydrodynamics formulation for thermo-capillary phase change problems involving solid, liquid and gaseous phases with special focus on selective laser melting, an emerging metal additive manufacturing technique. Evaporation-induced recoil pressure, temperature-dependent surface tension and wetting forces are considered as mechanical interface fluxes, while a Gaussian laser beam heat source and evaporation-induced heat losses are considered as thermal interface fluxes. A novel interface stabilization scheme is proposed, which is shown to allow for a stable and smooth liquid–gas interface by effectively damping spurious interface flows as typically occurring in continuum surface force approaches. Moreover, discretization strategies for the tangential projection of the temperature gradient, as required for the discrete Marangoni forces, are critically reviewed. The proposed formulation is deemed especially suitable for modeling of the melt pool dynamics in metal additive manufacturing because the full range of relevant interface forces is considered and the explicit resolution of the atmospheric gas phase enables a consistent description of pore formation by gas inclusion. The accuracy and robustness of the individual model and method building blocks is verified by means of several selected examples in the context of the selective laser melting process.de_DE
tuhh.publisher.doi10.1016/j.cma.2021.113812-
tuhh.publication.instituteKontinuums- und Werkstoffmechanik M-15de_DE
tuhh.type.opus(wissenschaftlicher) Artikel-
dc.type.driverarticle-
dc.type.casraiJournal Article-
tuhh.container.volume381de_DE
dc.identifier.scopus2-s2.0-85104437312de_DE
tuhh.container.articlenumber113812de_DE
local.status.inpressfalsede_DE
local.funding.infoThis work was supported by a postdoc fellowship of the German Academic Exchange Service (DAAD), Germany and by funding of the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within project 437616465 and project 414180263 .de_DE
item.creatorOrcidMeier, Christoph-
item.creatorOrcidFuchs, Sebastian Leonhard-
item.creatorOrcidHart, A. John-
item.creatorOrcidWall, Wolfgang A.-
item.languageiso639-1en-
item.openairetypeArticle-
item.fulltextNo Fulltext-
item.creatorGNDMeier, Christoph-
item.creatorGNDFuchs, Sebastian Leonhard-
item.creatorGNDHart, A. John-
item.creatorGNDWall, Wolfgang A.-
item.mappedtypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.grantfulltextnone-
item.cerifentitytypePublications-
crisitem.author.deptKontinuums- und Werkstoffmechanik M-15-
crisitem.author.orcid0000-0003-0250-6876-
crisitem.author.orcid0000-0001-7419-3384-
crisitem.author.parentorgStudiendekanat Maschinenbau-
crisitem.funder.funderid501100001659-
crisitem.funder.funderrorid018mejw64-
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