Viscous-Flow Calculations for KVLCC2 in Deep and Shallow Water

Toxopeus, Serge

doi:10.1007/978-94-007-6143-8_9

Cited by 13 publications

(8 citation statements)

References 11 publications

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“…Taking into consideration that a KCS ship model is used in the current study, the calculated values of form factor exhibit a similar trend to (Toxopeus, S., 2011) in which computational fluid dynamics (CFD) were employed to calculate the viscous flow for KLVCC2 and showed that form factor varies with condition change from shallow to deep water. It is observed from Figure 25 that there exists a clearer relation between form factor (1+k) and water depth to ship model draft ratio (H/T).…”

Section: Form Factormentioning

confidence: 61%

Experimental analysis of the squat of ships advancing through the New Suez Canal

et al. 2019

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As a ship travels forward, squat of the ship may occur due to an increase in sinkage and trim. Squat is a crucial factor that restricts ship navigation in shallow water. A new division of the Suez Canal, the New Suez Canal, recently opened for international navigation. It is important to obtain accurate prediction data for ship squat to minimise the risk of grounding in this canal.To provide guidance for shipping in canals a series of experiments was conducted on a model scale of the Kriso Container Ship (KCS). The squat of the KCS was examined by measuring its sinkage and trim. A wide range of water depth to ship draft ratios at various ship speeds was investigated. Additionally, the blockage effect was studied by varying the canal width, and deep water tests were performed. The results indicated that for Froude's number based on depth (Fnh) below 0.4, measured squat value do not change with either Fnh or depth to draft ratio (H/T). The squat increases with H/T values for Froude numbers higher than 0.4. Moreover, a canal with reduced width had a negligible effect on squat, suggesting that the next segment of the Suez Canal can be built to a narrower width.

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Section: Form Factormentioning

confidence: 61%

Experimental analysis of the squat of ships advancing through the New Suez Canal

et al. 2019

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“…Thorough code verification is performed for all releases of ReFRESCO [45]. Earlier applications of ReFRESCO in the NATO context can be found in [46][47][48][49][50][51][52]. In the present simulations, a single-phase, incompressible fluid was adopted.…”

Section: Numerical Solver Boundary Conditions and Turbulence Modelsmentioning

confidence: 99%

Computations of the BeVERLI Hill Three-dimensional Separating Flow Model Validation Cases

Gargiulo

Ozoroski

Hallock

et al. 2022

AIAA SCITECH 2022 Forum

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The BeVERLI (Benchmark Validation Experiment for RANS/LES Investigations) Hill project aims at producing a detailed experimental database of three-dimensional non-equilibrium turbulent boundary layers with various levels of separation while meeting the most exacting requirements of computational fluid dynamics validation as per Oberkampf and Smith [1]. A group of the Science and Technology Organization (STO) of the North Atlantic Treaty Organization (NATO) entitled NATO AVT-349 -"Non-Equilibrium Turbulent Boundary Layers in High Reynolds Number Flow at Incompressible Conditions" has recently considered the BeVERLI Hill case. Their goal is to advance the accuracy and range of prediction models for high Reynolds number non-equilibrium boundary layers. This highly collaborative and international group comprised of various academic, governmental, and industrial institutions has performed several Reynolds-averaged Navier-Stokes (RANS) simulations of the BeVERLI Hill using different grids, solvers, and turbulence models. The resulting solutions and available experimental data are presented in this paper to summarize and highlight key features, sensitivities, and the current predictive capability of RANS for the BeVERLI Hill case. The results suggest important sensitivities to Reynolds number, grid density, iterative converge,

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“…Specifically, although in model-scale computations, a significant portion of the ship hull is covered by a laminar layer, most turbulence models assume the flow is fully turbulent. Yet, results with accuracy of a few percentage error can be found in the open literature [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Virtual Replica of a Towing Tank Experiment to Determine the Kelvin Half-Angle of a Ship in Restricted Water

Terziev

Zhao

Tezdogan

et al. 2020

JMSE

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The numerical simulation of ship flows has evolved into a highly practical approach in naval architecture. In typical virtual towing tanks, the principle of Galilean relativity is invoked to maintain the ship as fixed, while the surrounding water is prescribed to flow past it. This assumption may be identified, at least partly, as being responsible for the wide-scale adoption of computational solutions within practitioners’ toolkits. However, it carries several assumptions, such as the levels of inlet turbulence and their effect on flow properties. This study presents an alternative virtual towing tank, where the ship is simulated to advance over a stationary fluid. To supplement the present work, the free surface disturbance is processed into Fourier space to determine the Kelvin half-angle for an example case. The results suggest that it is possible to construct a fully unsteady virtual towing tank using the overset method, without relying on Galilean relativity. Differences between theoretical and numerical predictions for the Kelvin half-angle are predominantly attributed to the assumptions used by the theoretical method. The methods presented in this work can potentially be used to validate free-surface flows, even when one does not have access to experimental wave elevation data.

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Viscous-Flow Calculations for KVLCC2 in Deep and Shallow Water

Cited by 13 publications

References 11 publications

Experimental analysis of the squat of ships advancing through the New Suez Canal

Experimental analysis of the squat of ships advancing through the New Suez Canal

Computations of the BeVERLI Hill Three-dimensional Separating Flow Model Validation Cases

Virtual Replica of a Towing Tank Experiment to Determine the Kelvin Half-Angle of a Ship in Restricted Water

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