Original title: On Reynolds-averaged turbulence modeling with immersed boundary method
Authors: Kubíčková, Lucie ; Isoz, Martin
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2023, Prague (CZ), 20230222
Year: 2023
Language: eng
Abstract: The immersed boundary (IB) method is an approach in the computational fluid dynamics in which complex geometry conforming meshes are replaced by simple ones and the true simulated geometry is projected onto the simple mesh by a scalar field and adjustment of governing equations. Such an approach is particularly advantageous in topology optimizations (TO) where it allows for substantial speed-up since a single mesh can be used for all the tested topologies. In our previous work, we linked our custom IB variant, the hybrid fictitious domain-immersed boundary method (HFDIB), with a TO framework and successfully carried out an optimization under laminar flow conditions. However, to allow for optimizations of reallife components, the IB approach needs to be coupled with an affordable turbulence modeling. In this contribution, we focus on extending the HFDIB approach by the possibility to perform Reynolds-averaged simulations (RAS). In particular, we implemented the k − ω turbulence model and wall functions for closure variables and velocity.
Keywords: CFD; immersed boundary; OpenFOAM; RAS; wall functions
Host item entry: Topical Problems of Fluid Mechanics 2023, ISBN 978-80-87012-83-3, ISSN 2336-5781

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: http://www2.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2023/15-TPFM2023.pdf
Original record: https://hdl.handle.net/11104/0349999

Permalink: http://www.nusl.cz/ntk/nusl-538536


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