Název: Reynolds-averaged simulation of turbulent flows with immersed boundaries
Autoři: Kubíčková, Lucie ; Isoz, Martin
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering mechanics 2024 /30./, Milovy (CZ), 20240514
Rok: 2024
Jazyk: eng
Abstrakt: Simulating turbulent flows in complex real-life geometries faces two major problems. First, direct simulation of turbulent flow is extremely costly. Second, a complex geometry-conforming mesh is required, and such mesh presumably suffers from several mesh-quality related problems lowering the solution accuracy and prolonging the simulation time. To solve the first problem, phenomenological turbulence models based on, e.g. Reynolds-averaging, are commonly utilized. To address the second one, a variant of an immersed boundary (IB) method can be used where the complex geometry is projected onto a simple mesh by an indi-cator field and adjustment of governing equations. Consequently, a connection of Reynolds-averaging and an immersed boundary method shall resolve both the problems and provide a simulation approach favorable for e.g. optimizations. However, such a connection is not common. In this contribution, we utilize our custom IB variant, the hybrid fictitious domain-immersed boundary method (HFDIB) and aim on extending the HFDIB by tools of the Reynolds-averaged simulation (RAS). In comparison with standard simulation approaches, the new HFDIB-RAS approach shows acceptable results in wide range of flow Reynolds numbers and in several testing geometries.
Klíčová slova: computational fluid dynamics; immersed boundary method; Reynolds-averaged simulation; wall functions
Číslo projektu: TN02000069, EH22_008/0004591
Poskytovatel projektu: GA TA ČR, GA MŠk
Zdrojový dokument: Engineering Mechanics 2024, ISBN 978-80-214-6235-9, ISSN 1805-8248
Poznámka: Související webová stránka: https://www.engmech.cz/im/proceedings/show/2024

Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: https://hdl.handle.net/11104/0361337

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-669186