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Validation study for Large-Eddy Simulation of Forest Flow

Pitchurov, George; Gromke, Christof; Denev, Jordan A.; Cesar Cunha Galeazzo, Flavio

Abstract (englisch):
The publication presents Large-Eddy Simulation (LES) of flow over a reduced-scale wind tunnel model of a forest canopy. The final aim of the study is to determine factors responsible for damage in forests by strong winds. The wind tunnel forest was represented by an open-porous foam material for the crown layer and wooden dowels for the trunk layer. The forest model was installed in the open test section of a Goettingen-type wind tunnel and Particle Image Velocimetry (PIV) measurements were made for the acquisition of the flow field data. The numerical simulations were performed with OpenFOAM®. The forest was modelled by an additional sink term in the momentum transport equations based on the leaf area density and a characteristic drag coefficient for the underlying tree specimen. Large-eddy simulations with different subgrid-scale (SGS) turbulence models were carried out and compared to wind tunnel data. The Smagorinsky SGS model outperformed the dynamic Lagrangian SGS model in the windward edge region (within a distance of approximately 2 tree heights from the leading edge) whereas the dynamic Lagrangian SGS model showed a better performance for regions farther downstream.

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DOI: 10.1051/e3sconf/202020702010
Zugehörige Institution(en) am KIT Institut für Hydromechanik (IFH)
Steinbuch Centre for Computing (SCC)
Karlsruher Institut für Technologie (KIT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2267-1242
KITopen-ID: 1000127876
Erschienen in E3S Web of Conferences
Verlag EDP Open
Band 207
Seiten Art.-Nr.: 02010
Bemerkung zur Veröffentlichung 25th Scientific Conference on Power Engineering and Power Machines (PEPM’2020)
Vorab online veröffentlicht am 18.11.2020
Nachgewiesen in Scopus
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