Knaus, Lisa und Haff, Johannes und Lietmeyer, Christoph und Weinman, Keith und Wagner, Claus (2025) Comparative Study of the use of Finite Volume Method and Lattice Boltzmann Method for Full-Body Automotive Simulations using the DrivAer Model. SAE Technical Papers, 1 (5052), Seiten 1-19. Society of Automotive Engineers (SAE) International. doi: 10.4271/2025-01-5052. ISSN 0148-7191.
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Offizielle URL: https://www.sae.org/publications/technical-papers/content/2025-01-5052/
Kurzfassung
The use of partially scale-resolving CFD (computational fluid dynamics) techniques represents a state-of-the-art approach to aerodynamic design, which is increasingly being adopted by the industry. It still remains crucial to validate the available tools by means of experimental data. The availability of experimental data for the full-scale DrivAer model is still limited when ground simulation is included. New experimental data, including flow field measurements, will be presented in this study. The performance of two commonly used CFD solvers, the finite volume method (FVM)–based open-source Toolbox OpenFOAM and the commercial lattice Boltzmann method (LBM)–based solver PowerFLOW will be analyzed and validated against experimental data. In particular, the flow field around the notchback configuration of the DrivAer model, which includes a shallow detachment region, has proven to be challenging to reproduce in CFD. The results obtained from delayed detached eddy simulation (DDES) exhibit a significant discrepancy with respect to experimental data and unsteady Reynolds-averaged simulations (URANS) in this region. The flow detaches prematurely when DDES is applied. This is caused by an incorrect behavior of the limiter, which is designed to shield the URANS mode from intrusion of large eddy simulation (LES) mode. The recently published enhanced protection (EP) method provides more favorable results in this area. LBM, while generally in good agreement with experiments, predicts a premature separation, most likely due to the Cartesian grid not allowing sufficient resolution. In another challenging area, namely the wheels, the scale-resolving methods show the best results.
elib-URL des Eintrags: | https://elib.dlr.de/216337/ | ||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||
Zusätzliche Informationen: | ISSN 0148-7191 eISSN 2688-3627 | ||||||||||||||||||||||||
Titel: | Comparative Study of the use of Finite Volume Method and Lattice Boltzmann Method for Full-Body Automotive Simulations using the DrivAer Model | ||||||||||||||||||||||||
Autoren: |
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Datum: | 21 Juli 2025 | ||||||||||||||||||||||||
Erschienen in: | SAE Technical Papers | ||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||
Band: | 1 | ||||||||||||||||||||||||
DOI: | 10.4271/2025-01-5052 | ||||||||||||||||||||||||
Seitenbereich: | Seiten 1-19 | ||||||||||||||||||||||||
Herausgeber: |
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Verlag: | Society of Automotive Engineers (SAE) International | ||||||||||||||||||||||||
ISSN: | 0148-7191 | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | CFD, Experiment, Detached Eddy Simulation, Grid sheilding functions, Drag force | ||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||
HGF - Programm: | Verkehr | ||||||||||||||||||||||||
HGF - Programmthema: | Schienenverkehr | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Verkehr | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | V SC Schienenverkehr | ||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | V - RoSto - Rolling Stock, V - INTRA - Infrastruktur und Transformation | ||||||||||||||||||||||||
Standort: | Göttingen | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Bodengebundene Fahrzeuge | ||||||||||||||||||||||||
Hinterlegt von: | Weinman, Dr.phil. Keith | ||||||||||||||||||||||||
Hinterlegt am: | 17 Sep 2025 11:38 | ||||||||||||||||||||||||
Letzte Änderung: | 17 Sep 2025 11:38 |
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