Numerical Investigating the Effect of Water Depth on Ship Resistance Using RANS CFD Method

Hoa, Nguyễn Thị Ngọc; Bich, Vu Ngoc; Tu, Tran Ngoc; Chien, Nguyen Manh; Le, Tat-Hien

doi:10.2478/pomr-2019-0046

Cited by 14 publications

(13 citation statements)

References 8 publications

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“…The two fluids (water and air) are assumed to be immiscible and incompressible [22] [25]. The interface between air and water is captured by using the VOF technique and the High-Resolution Interface Capturing (HRIC) scheme [31][32]. The VOF technique has been illustrated in the author's previous work [33].…”

Section: Numerical Model Numerical Methodsmentioning

confidence: 99%

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Experimental Study and Numerical Simulation of the Water Entry of a Ship-Like Symmetry Section with an Obvious Bulbous Bow

Wang

Zhang

et al. 2021

Polish Maritime Research

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A bulbous bow is a typical ship structure. Due to the influence of the bulbous bow, complex flow separation and gas capture phenomena may appear during the water entry of ship-like sections. In this paper, experimental and numerical studies on the water entry of a ship-like section with an obvious bulbous bow are carried out. Two thin plates are installed at both ends of the test model to ensure that the flow field during the impact process is approximately two-dimensional. The free-fall drop test is carried out in the test rig equipped with guide rails. By changing drop heights, impact pressure on the model surface with different initial impact velocities is measured. A numerical model for simulating the water entry of the ship-like section is established by using the Computational Fluid Dynamics (CFD) method, based on the Navier-Stokes equations. Reasonable time steps and mesh size are determined by convergence analysis. Four different flow models are used in the numerical analysis. It is found that the K-Epsilon turbulence model can present the most reasonable numerical prediction by comparing numerical results with the experimental data. Furthermore, the influence of the bulbous bow on the impact loads is numerically studied by using the validated numerical model. It suggests that the bulbous bow has little effect on the impact force acting on the bow-flared area but, in the position near the bulbous bow, the pressure will be affected by the second slamming and the air cushion.

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Section: Numerical Model Numerical Methodsmentioning

confidence: 99%

“…W is the half-width of the bow-flared sections. Referring to the discussion on the size of the computational domain [32] [34], the lengths of L1, L2 and H are set to 8W, 4W and 10W, respectively. The boundary conditions of the numerical model are set as follows.…”

Section: Computational Overviewmentioning

confidence: 99%

Experimental Study and Numerical Simulation of the Water Entry of a Ship-Like Symmetry Section with an Obvious Bulbous Bow

Wang

Zhang

et al. 2021

Polish Maritime Research

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“…The main dimensions of the ship and model where all values refer to the origin located at (AP/CL/BL) are given in table (2) and in figure (5) the KCS is represented by solid lines.…”

Section: Ship Particularsmentioning

confidence: 99%

“…The fast development of computational resources both in terms of advanced software and faster computers is making (CFD) methods the primary tool for ship designers in solving problems related to hydrodynamics [5].…”

Section: Introductionmentioning

confidence: 99%

Prediction of a Container Ship Squat in Suez Canal Using CFD

Desouky

Elhenawy²

2022

Port-Said Engineering Research Journal

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Minor grounding or contact accidents may occur from time to time in Suez Canal. However, in March 2021, the economic ramifications of a critical grounding resounded around the world and were still felt after the Ever-Given container ship was freed from the banks. The results of a computational investigation of a ship cruising through Suez Canal are presented in this study, and hopefully can be utilized to foresee and prevent future ship's squat and bank effects throughout the determination of proper trim. The KRISO Container Ship (KCS) was picked as the example vessel for this investigation, carried out through the commercial code STAR-CCM+, and representing a comprehensive CFD analysis of such an event. The governing equations are expressed in integral form by the finite-volume based solver STAR-CCM+. The CFD investigation is performed by utilizing a Reynolds-Averaged Navier-Stokes (RANS) solver, a k-ε turbulence model and the Volume of Fluid (VOF) approach. The CFD model is validated based on the ships' experimental data. The investigation empowers shipmasters and marine pilots to comprehend the effects of squat thus avoiding ship accidents when going through Suez Canal.

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“…is author proposed a model for analyzing the hydrodynamic and the propulsion of a boat on restricted water depth. Recently, i Ngoc Hoa et al [35] investigated the impact of the depth of the waterway on the ship's resistance and propulsion using a computational fluid dynamic method.…”

Section: Energy Consumption Modelsmentioning

confidence: 99%

The Electric Riverboat Charging Station Location Problem

Villa

Montoya

Herrera

2020

Journal of Advanced Transportation

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Nowadays, the electric mobility is mainly focused on urban areas. However, the use of Photovoltaic-assisted Charging Stations (PVCSs) can contribute to implement the electric mobility in rural areas disconnected from the national grid. Inspired by the new river operations with an Electric Boat (EB), we introduce a new location problem named the Electric Riverboat Charging Station Location Problem (ERCSLP). This problem estimates the necessary infrastructure for an EB to be able to perform a round trip. In this case, we decide the location of the PVCSs and the size of the EB battery aiming to minimize the sum of the PVCS and the EB battery costs. In this problem, we include the nonlinear behavior of the charging function and the variation of the solar radiation. For solving this problem, we propose a Mixed-Integer Linear Programming (MILP) formulation. For testing this MILP formulation, we build a set of instances based on real river transport operations that have the potential to migrate to the electric mobility. In our computational experiments, we show that our MILP formulation can find the optimal solution of the instances. Finally, we perform a sensitivity analysis and an economic viability analysis of the electric mobility in these operations.

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Numerical Investigating the Effect of Water Depth on Ship Resistance Using RANS CFD Method

Cited by 14 publications

References 8 publications

Experimental Study and Numerical Simulation of the Water Entry of a Ship-Like Symmetry Section with an Obvious Bulbous Bow

Experimental Study and Numerical Simulation of the Water Entry of a Ship-Like Symmetry Section with an Obvious Bulbous Bow

Prediction of a Container Ship Squat in Suez Canal Using CFD

The Electric Riverboat Charging Station Location Problem

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