Print Email Facebook Twitter Recent advances in understanding the flow over bluff bodies with different geometries at moderate Reynolds numbers Title Recent advances in understanding the flow over bluff bodies with different geometries at moderate Reynolds numbers Author Lekkala, Malakonda Reddy (Universiti Teknologi Petronas) Latheef, Mohamed (Universiti Teknologi Petronas) Jung, Jae Hwan (Korea Research Institute of Ships and Ocean Engineering (KRISO)) Coraddu, A. (TU Delft Ship Design, Production and Operations) Zhu, Hongjun (Southwest Petroleum University) Srinil, Narakorn (Newcastle University) Lee, Byung Hyuk (Korea Shipbuilding & Offshore Engineering Co.) Kim, Do Kyun (Seoul National University) Date 2022 Abstract The application of unsteady incompressible flow phenomenon over the bluff bodies has received the attention of many researchers due to the rich and complex physics underpinning these flows, and thus requiring special attention in their modelling and numerical simulations. The wake that forms at the leeside of the bluff body is of particular interest. Reynolds number and geometry are in turn two prominent parameters that govern the formation and subsequent behaviour of this wake. This paper reviews the wake formations for different cylindrical bluff bodies cross-sections such as circular, elliptical, helically twisted elliptical, symmetric wavy, asymmetric wavy, and harbor seal vibrissae cylinders. Alongside the Reynolds number and geometrical shape, the impacts of rotational rate, aspect ratio, angle of attack, and gap ratio between the cylinder and the bottom wall on the hydrodynamic coefficients, Strouhal number, recirculation length and suppression of vortex shedding in the cylinder wake are investigated. In addition, the variation of hydrodynamic coefficients for different cylindrical shapes are compared. Finally, concluding remarks are drawn based on recent advances in understanding the flow features and predictions with CFD methods. Subject Biomimetic geometriesComputational fluid dynamics (CFD)Cylinder geometryFlow around bluff bodyFlow characteristicsHydrodynamic coefficientsReynolds numberWake pattern To reference this document use: http://resolver.tudelft.nl/uuid:4081d3a6-8217-4c00-8d2a-a607c26b9438 DOI https://doi.org/10.1016/j.oceaneng.2022.111611 ISSN 0029-8018 Source Ocean Engineering, 261 Part of collection Institutional Repository Document type review Rights © 2022 Malakonda Reddy Lekkala, Mohamed Latheef, Jae Hwan Jung, A. Coraddu, Hongjun Zhu, Narakorn Srinil, Byung Hyuk Lee, Do Kyun Kim Files PDF 1_s2.0_S0029801822009751_main.pdf 19.92 MB Close viewer /islandora/object/uuid:4081d3a6-8217-4c00-8d2a-a607c26b9438/datastream/OBJ/view