Experimental evaluation of ship squat in shallow waters

Kazerooni, Mohammadreza Fathi; Seif, Mohammad Saeed

doi:10.1007/s40430-013-0114-y

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…This was done by numerical simulations which were conducted by solving the 3-D Navier-Stokes equations along with the standard k-ε turbulence model. Kazerooni, M.F. and Seif, M.S., (2013) measured and analysed the squat phenomenon by using model tests for a tanker ship model and Dhow model performed in a towing tank.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

et al. 2019

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“…With the introduction of IMO regulations on maneuvering criteria under the influence of wind and waves, a more comprehensive approach became necessary. As a result, mathematical models with all six DOF became mandatory for ship maneuvering [6,[28][29][30]. By using all six DOF, these updated mathematical models can effectively estimate the longitudinal forces, pitching forces, and yawing moments acting on the ship during maneuvering [31].…”

Section: Introductionmentioning

confidence: 99%

Ship Maneuvering in Shallow and Narrow Waters: Predictive Methods and Model Development Review

Maljković,

Pavić,

Meštrović

et al. 2024

Preprint

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The maneuverability of ships is influenced by several factors, including ship design, size, propulsion system, hull shape, and external conditions such as wind, waves, and currents. The size, shape, and arrangement of the hull, rudder, and propeller are decisive for maneuverability. Hydrodynamic forces such as bank effect and squat significantly impact the maneuverability of large ships in narrow channels. With the increasing trend of building ever-larger ships, the demand to evaluate the maneuvering performance of the ship at the design stage has become more critical than ever. Both experimental and computational methods are used to obtain accurate maneuvering characteristics of vessels. In this study, the methods for predicting ship maneuvering characteristics are analyzed using a systematic review based on the preferred reporting items for systematic reviews and meta-analyses (PRISMA). This article contributes to a deeper understanding of the hydrodynamic capabilities of ships and identifies possible future challenges in the field of ship hydrodynamics. The findings inform educators and the shipping industry about the importance of predicting the maneuvering performance of ships, with an emphasis on the education and training of seafarers needed to make timely decisions in critical situations.

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Unsteady simulation of AUVs approaching seafloor by self-propulsion using multi-block hybrid dynamic grid method

Wu¹,

Li²,

Feng³

et al. 2022

Journal of Fluids and Structures

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Experimental evaluation of ship squat in shallow waters

Cited by 4 publications

References 9 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

Ship Maneuvering in Shallow and Narrow Waters: Predictive Methods and Model Development Review

Unsteady simulation of AUVs approaching seafloor by self-propulsion using multi-block hybrid dynamic grid method

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