DC FieldValueLanguage
dc.contributor.authorMierke, Dennis-
dc.contributor.authorJanßen, Christian Friedrich-
dc.contributor.authorRung, Thomas-
dc.date.accessioned2020-11-03T16:40:56Z-
dc.date.available2020-11-03T16:40:56Z-
dc.date.issued2020-01-01-
dc.identifier.citationComputers and Mathematics with Applications 1 (79): 66-87 (2020-01-01)de_DE
dc.identifier.issn0898-1221de_DE
dc.identifier.urihttp://hdl.handle.net/11420/7756-
dc.description.abstractThis paper presents a new and efficient algorithm for the calculation of sub-grid distances in the context of a lattice Boltzmann method (LBM). LBMs usually operate on equidistant Cartesian grids and represent moving geometries by either using immersed boundary conditions or dynamic fill algorithms in combination with slip or no-slip boundary conditions. In order to obtain sufficiently high geometric accuracy, the sub-grid distances from Eulerian fluid nodes on uniform and structured grids to a tessellated triangular surface mesh have to be calculated. The proposed algorithm extends a previously published grid generation procedure by an efficient calculation of sub-grid distances. The algorithm is optimized for massively parallel execution on graphics processing units (GPUs). Based on a linearized representation of the obstacle surface, surface normal vectors are computed and stored, which then serve to compute the sub-grid distances. This saves GPU memory, re-uses information that is available from the surface voxelization step, and has shown to be very accurate and efficient for the implementation in a state-of-the-art LBM-GPU solver.en
dc.language.isoende_DE
dc.relation.ispartofComputers and mathematics with applicationsde_DE
dc.subjectGraphics processing unit (GPU)de_DE
dc.subjectGrid generationde_DE
dc.subjectLBMde_DE
dc.subjectLinear-interpolated bounce-backde_DE
dc.subjectSub-grid distancesde_DE
dc.titleAn efficient algorithm for the calculation of sub-grid distances for higher-order LBM boundary conditions in a GPU simulation environmentde_DE
dc.typeArticlede_DE
dc.type.diniarticle-
dcterms.DCMITypeText-
tuhh.abstract.englishThis paper presents a new and efficient algorithm for the calculation of sub-grid distances in the context of a lattice Boltzmann method (LBM). LBMs usually operate on equidistant Cartesian grids and represent moving geometries by either using immersed boundary conditions or dynamic fill algorithms in combination with slip or no-slip boundary conditions. In order to obtain sufficiently high geometric accuracy, the sub-grid distances from Eulerian fluid nodes on uniform and structured grids to a tessellated triangular surface mesh have to be calculated. The proposed algorithm extends a previously published grid generation procedure by an efficient calculation of sub-grid distances. The algorithm is optimized for massively parallel execution on graphics processing units (GPUs). Based on a linearized representation of the obstacle surface, surface normal vectors are computed and stored, which then serve to compute the sub-grid distances. This saves GPU memory, re-uses information that is available from the surface voxelization step, and has shown to be very accurate and efficient for the implementation in a state-of-the-art LBM-GPU solver.de_DE
tuhh.publisher.doi10.1016/j.camwa.2018.04.022-
tuhh.publication.instituteFluiddynamik und Schiffstheorie M-8de_DE
tuhh.type.opus(wissenschaftlicher) Artikel-
dc.type.driverarticle-
dc.type.casraiJournal Article-
tuhh.container.issue1de_DE
tuhh.container.volume79de_DE
tuhh.container.startpage66de_DE
tuhh.container.endpage87de_DE
dc.relation.projectEinfluss der Formgebung von Schiffen auf die Propulsionseffizienz und Propeller-Eis-Belastung; Modellierung der Umströmung von Schiffen in eisbedeckten Gewässern-
dc.identifier.scopus2-s2.0-85047367370-
datacite.resourceTypeJournal Article-
datacite.resourceTypeGeneralText-
item.grantfulltextnone-
item.cerifentitytypePublications-
item.openairetypeArticle-
item.creatorOrcidMierke, Dennis-
item.creatorOrcidJanßen, Christian Friedrich-
item.creatorOrcidRung, Thomas-
item.languageiso639-1en-
item.creatorGNDMierke, Dennis-
item.creatorGNDJanßen, Christian Friedrich-
item.creatorGNDRung, Thomas-
item.fulltextNo Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.mappedtypeArticle-
crisitem.project.funderBundesministerium für Wirtschaft und Klimaschutz (BMWK)-
crisitem.project.funderid501100006360-
crisitem.project.funderrorid02vgg2808-
crisitem.project.grantno03SX391G-
crisitem.author.deptFluiddynamik und Schiffstheorie M-8-
crisitem.author.deptFluiddynamik und Schiffstheorie M-8-
crisitem.author.deptFluiddynamik und Schiffstheorie M-8-
crisitem.author.orcid0000-0002-8883-1911-
crisitem.author.orcid0000-0003-1462-2778-
crisitem.author.orcid0000-0002-3454-1804-
crisitem.author.parentorgStudiendekanat Maschinenbau-
crisitem.author.parentorgStudiendekanat Maschinenbau-
crisitem.author.parentorgStudiendekanat Maschinenbau-
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