Publication:
Separated Flow Past An Airfoil at High Angle of Attack: LES Predictions and Analysis

cris.virtual.departmentStrömungsmechanik
cris.virtual.department#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.departmentbrowseStrömungsmechanik
cris.virtual.departmentbrowseStrömungsmechanik
cris.virtualsource.departmentba61e71a-d073-4609-89b6-c10b460b09a8
cris.virtualsource.department#PLACEHOLDER_PARENT_METADATA_VALUE#
dc.contributor.authorJovicic, Nikola
dc.contributor.authorBreuer, Michael
dc.date.issued2004
dc.description.abstractThe objective of this study is the prediction and analysis of the turbulent flow past an unswept wing at high angle of attack. The LES predictions were based on two different subgrid-scale models (Smagorinsky and Dynamic). The Reynolds number (Rec= 105) and the angle of attack ($\alpha$ = 18{\textdegree}) were chosen such that the flow exhibits a trailing-edge separation at the lowest Recrealizable within the corresponding experiment COSTWING. At these operating conditions, many interesting flow phenomena appear, e.g., a thin separation bubble, transition, separation, and large-scale vortical structures. Qualitatively the predictions based on both SGS models show the same aforementioned flow features, although some noteworthy differences become evident, e.g., the shape and size of the separation bubble. This has a strong impact on the transition process and thus the succeeding development of the entire flow yielding quantitative deviations regarding Cp, Cfor k. The differences can be attributed to a well-known shortcoming of the Smagorinsky model. In addition, the paper aims at a deeper insight into the nature of turbulent separated flows. For that purpose the LES data were analyzed according to the anisotropy-invariant theory which provides an improved illustration of what happens in a turbulent flow. Therefore, the anisotropy invariants at various locations in the flow were displayed in the invariant map in order to analyze the state of turbulence in distinct regions.
dc.description.versionNA
dc.identifier.citationJovičić, N., Breuer, M. (2004). Separated Flow Past an Airfoil at High Angle of Attack: LES Predictions and Analysis. In: Friedrich, R., Geurts, B.J., Métais, O. (eds) Direct and Large-Eddy Simulation V. ERCOFTAC Series, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-2313-2_64
dc.identifier.doi10.1007/978-1-4020-2313-2_64
dc.identifier.isbn978-90-481-6575-9
dc.identifier.urihttps://openhsu.ub.hsu-hh.de/handle/10.24405/15060
dc.language.isoen
dc.publisherSpringer
dc.relation.conferenceFifth International ERCOFTAC Workshop on DNS and LES: DLES-5, Munich University of Technology, Germany, Aug. 27–29, 2003
dc.relation.journalERCOFTAC Series
dc.relation.orgunitStrömungsmechanik
dc.rights.accessRightsmetadata only access
dc.titleSeparated Flow Past An Airfoil at High Angle of Attack: LES Predictions and Analysis
dc.typeBook part
dcterms.bibliographicCitation.booktitleDirect and Large-Eddy Simulation V
dcterms.bibliographicCitation.originalpublisherplaceDordrecht
dspace.entity.typePublication
hsu.peerReviewed
hsu.uniBibliographyNein
oaire.citation.endPage618
oaire.citation.startPage611
oaire.citation.volume9
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