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Publications
Li, H.S., Wang, S. and Guedes Soares, C. (2024), Uncertainty assessment of the scale effects on a submerged cylinder, Advances in Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor and Francis, London, UK, pp. 139-148.
This study investigates scale effects on hydrodynamics of a 2D submerged circular cylinder subjected to incoming flow in CFD simulation. The primary focus is the influence of varying scale ratios on drag coefficient CD, lift coefficient CL, and vortex shedding frequency f in high Reynolds number (104) conditions. The methodology involves k-kl-w turbulence model and pimpleFoam solver in OpenFOAM. Initial simulations establish baseline values for CD, CL, and f in deep open water. Subsequent simulations examine these parameters for cylinders at different scale ratios. Numerical discretization uncertainty for each case is quantified by using a Correction Factor based Approach to verify the simulation results, allowing for an assessment of scale effect. Results indicate that CD, CL, and f show significant variations with scale changes, even at the same Re. This variation is more pronounced in large scale and low flow velocity conditions. The study highlights the importance of considering scale effects in CFD simulations of underwater objects.
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