Název:
Numerical assessment of stratification influence in simple algebraic turbulence model
Autoři:
Uhlíř, V. ; Bodnár, Tomáš ; Caggio, Matteo Typ dokumentu: Příspěvky z konference Konference/Akce: Topical Problems of Fluid Mechanics 2022, Prague (CZ), 20220216
Rok:
2022
Jazyk:
eng
Abstrakt: This paper presents rst few results obtained using a newly developed test code aimed at validation and cross-comparison of turbulence models to be applied in environmental flows. A simple code based on nite di erence discretization is constructed to solve steady flows of incompresible non-homogeneous (variable denstity) fluids. For the rst tests a simple algebraic turbulence model was implemented, containing stability function depending on the stratification via the gradient Richardson number. Numerical tests were performed in order to explore the capabilities of the new code and to get some insight into its behavior under di erent stratification. The two-dimensional simulations were performed using immersed boundary method for the flow over low smooth hill. The resulting flow fields are compared for selected Richarson numbers ranging from stable up to unstable strati cation conditions.
Klíčová slova:
algebraic turbulence model; artifcial compressibility method; immersed boundary; stratification Číslo projektu: GA19-04243S (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: Proceedings of Topical Problems of Fluid Mechanics 2022, ISBN 978-80-87012-77-2, ISSN 2336-5781 Poznámka: Související webová stránka: https://doi.org/10.14311/TPFM.2022.022
Instituce: Matematický ústav AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný v repozitáři Akademie věd. Původní záznam: http://hdl.handle.net/11104/0329340