Publication:
Analysis of turbulent structures in a czochralski system using DNS and LES predictions

cris.customurl9088
cris.virtual.departmentStrömungsmechanik
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cris.virtual.department#PLACEHOLDER_PARENT_METADATA_VALUE#
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cris.virtual.departmentbrowseStrömungsmechanik
cris.virtual.departmentbrowseStrömungsmechanik
cris.virtual.departmentbrowseStrömungsmechanik
cris.virtualsource.departmentba61e71a-d073-4609-89b6-c10b460b09a8
cris.virtualsource.department#PLACEHOLDER_PARENT_METADATA_VALUE#
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dc.contributor.authorRaufeisen, Alexander
dc.contributor.authorBreuer, Michael
dc.contributor.authorBotsch, Tilmann W.
dc.contributor.authorDelgado, Antonio
dc.date.issued2008
dc.description.abstractA DNS of the turbulent flow and heat transfer in an idealized Czochralski configuration was conducted using a very fine grid. The results show the irregular forming of buoyant thermal plumes as well as the occurrence of a large, stable vortical structure in the bulk of the melt. In the averaged flow field a Bénard-cell-like pattern can be recognized. The DNS data served also as a reference for the validation of the LES method. The LES computations were conducted using different grid sizes, SGS models, and discretization methods. For relatively fine grids and central differences, the results agree very well with the DNS. Using an upwind discretization introduces numerical errors. In combination with coarser grids, this leads to large deviations and even qualitative differences. However, overall the computational effort could be reduced significantly by LES. Thus a compromise between accuracy achieved and effort required has to be found.
dc.description.versionNA
dc.identifier.doi10.1007/978-3-540-74739-0_25
dc.identifier.isbn978-3-540747383
dc.identifier.scopus2-s2.0-84883081380
dc.identifier.urihttps://openhsu.ub.hsu-hh.de/handle/10.24405/9088
dc.language.isoen
dc.publisherSpringer
dc.relation.conferenceHigh Performance Computing in Science and Engineering 2007
dc.relation.orgunitStrömungsmechanik
dc.rights.accessRightsmetadata only access
dc.titleAnalysis of turbulent structures in a czochralski system using DNS and LES predictions
dc.typeConference paper
dcterms.bibliographicCitation.booktitleHigh Performance Computing in Science and Engineering `07 Transactions of the High Performance Computing Center, Stuttgart (HLRS) 2007
dcterms.bibliographicCitation.originalpublisherplaceBerlin
dspace.entity.typePublication
hsu.uniBibliography
oaire.citation.endPage386
oaire.citation.startPage371
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