Original title: Numerical assessment of stratification influence in simple algebraic turbulence model
Authors: Uhlíř, V. ; Bodnár, Tomáš ; Caggio, Matteo
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2022, Prague (CZ), 20220216
Year: 2022
Language: eng
Abstract: 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.
Keywords: algebraic turbulence model; artifcial compressibility method; immersed boundary; stratification
Project no.: GA19-04243S (CEP)
Funding provider: GA ČR
Host item entry: Proceedings of Topical Problems of Fluid Mechanics 2022, ISBN 978-80-87012-77-2, ISSN 2336-5781
Note: Související webová stránka: https://doi.org/10.14311/TPFM.2022.022

Institution: Institute of Mathematics AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0329340

Permalink: http://www.nusl.cz/ntk/nusl-508511


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