Abstract
The paper assesses the use of the most popular standard k-ε model and the most accurate Reynolds-stress model for various simple and complex flows including vehicles, and their impact on steady and transient RANS calculations. At the same time, the error of the steady state approach for the flows where transient effects are important, is analyzed. The Hybrid Turbulence Model is examined as an alternative solution, e.g. the recent proposal of combining the Boussinesq’s concept with the second moment closure. Finally, new possibilities in the further use of steady and averaged transient results will be addressed e.g. acoustic calculations. The paper compiles previous and present work performed at AVL List GmbH using the in-house commercial CFD software AVL Swift.
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© 2004 Springer-Verlag Berlin Heidelberg
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Basara, B., Tibaut, P. (2004). Time Dependent vs. Steady State Calculations of External Aerodynamics. In: McCallen, R., Browand, F., Ross, J. (eds) The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains. Lecture Notes in Applied and Computational Mechanics, vol 19. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-44419-0_9
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DOI: https://doi.org/10.1007/978-3-540-44419-0_9
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-53586-4
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