Roughness effect modelling for wall resolved RANS – Comparison of methods for marine hydrodynamics
2022 (Engelska) Ingår i: Ocean Engineering, ISSN 0029-8018, E-ISSN 1873-5258, Vol. 266, artikel-id 112778Artikel i tidskrift (Refereegranskat) Published
Abstract [en]
This paper deals with several aspects of surface roughness modelling in RANS codes applied to full-scale ship simulations. To select a method that is suitable for wall-resolved RANS solvers and gives reliable results at high Reynolds numbers, five different roughness models are compared. A grid uncertainty analysis is performed and the sensitivity to the grid resolution close to the wall (y+) is investigated. The results are compared to extrapolated results of experiments carried out with rough plates with various heights and roughness types. A correlation factor between the Average Hull Roughness and the equivalent sand roughness height is investigated, and a value of five is deemed the most suitable. The work suggests that the Aupoix-Colebrook roughness model gives the best results for full-scale ship simulations, at least with the current code, and that the near-wall grid resolution required for smooth surfaces can be applied also for the rough case. © 2022 The Authors
Ort, förlag, år, upplaga, sidor Elsevier Ltd , 2022. Vol. 266, artikel-id 112778
Nyckelord [en]
CFD, Full-scale, Hull, RANS, Roughness, Ship, Uncertainty, Verification, Hulls (ship), Navier Stokes equations, Reynolds number, Uncertainty analysis, Comparison of methods, Effect model, Grid resolution, Roughness effects, Roughness models, Ship simulation, Surface roughness, hydrodynamics, modeling, wall
Nationell ämneskategori
Maskinteknik
Identifikatorer URN: urn:nbn:se:ri:diva-61267 DOI: 10.1016/j.oceaneng.2022.112778 Scopus ID: 2-s2.0-85140272104 OAI: oai:DiVA.org:ri-61267 DiVA, id: diva2:1713853
Anmärkning Funding details: Vetenskapsrådet, VR, 2016–07213; Funding details: Energimyndigheten; Funding text 1: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Michal Orych reports financial support was provided by Energimyndigheten (Swedish Energy Agency). Michal Orych reports a relationship with FLOWTECH International AB that includes: board membership and employment.; Funding text 2: The authors would like to thank Swedish Energy Agency for the financial support. The computations were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at C3SE, partially funded by the Swedish Research Council through grant agreement no. 2016–07213.
2022-11-282022-11-282023-04-28 Bibliografiskt granskad