Numerical simulation of the stokes wave for the flow around a ship hull coupled with the VOF model

Chen, Shengtao; Zhong, Jingjun; Sun, Peng

doi:10.1007/s11804-015-1305-y

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…The geometry analyzed in this study is the reduced Wigley III hull model, which was also analyzed in the works by Journée [9], Yan et al, [13] Ghasemi et al, [15], and Chen et al, [16]. Figure 3 presents the Wigley III hull model.…”

Section: Geometrymentioning

confidence: 99%

“…Chen et al, [16] simulated the waves generated around a moving Wigley vessel by solving the RANS equations with the κ-ε turbulence model and the Volume of Fluid (VoF) method for the free surface. Mousavi, Khoogar, and Ghasemi [17] present a CFD simulation of a DTMB 5415 ship model with four degrees of freedom using the unsteady RANS method.…”

Section: Introduction 11 Purpose and Motivationmentioning

confidence: 99%

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CFD Analysis of The Heave and Pitch Motion of Hull Mode

Daruis¹,

Moreira

Fortes

et al. 2022

CFDL

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This work aims to predict numerically the vertical motions (heave and pitch) of a Wigley ship model heading over regular waves at Campos Basin, Brazil. Critical levels of periods and amplitudes from waves are determined based on historical data, these are re-dimensioned to a small scale and used as input data to the model. The flow is assumed to be incompressible and viscous with mass and momentum fluxes being conserved. The Computational Fluid Dynamics (CFD) software ANSYS Fluent which makes use of the finite volume method (FVM) is employed to solve continuity and the unsteady Reynolds Averaged Navier-Stokes (RANS) equations with a Shear-Stress Transport (SST) κ-ω turbulence model. The air-water interface is modelled via the Volume of Fluid (VOF) method. An UDF (User Defined Function) is set to simulate only these two degrees of freedom for the ship motion and different sea conditions are simulated with Response Amplitude Operators (RAOs) being compared to experiments, with a good agreement being found. The Campos Basin wave from the Southwest direction with a 1-year occurrence period is a wave with the highest dimensionless value resulting in a 0.172 of heave and the wave that has a North direction with a 1-year occurrence period is a wave with the highest dimensionless value resulting from the 0.097° pitch.

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Section: Geometrymentioning

confidence: 99%

Section: Introduction 11 Purpose and Motivationmentioning

confidence: 99%

CFD Analysis of The Heave and Pitch Motion of Hull Mode

Daruis¹,

Moreira

Fortes

et al. 2022

CFDL

View full text Add to dashboard Cite

show abstract

“…The continuity equation in VOF model is as follows:

\frac{1}{ρ_{q}} true[\frac{\partial}{\partial t} (α_{q} ρ_{q}) + \nabla • (α_{q} ρ_{q} {true \vec{v}}_{q}) = \sum_{p = 1}^{n} false({\overset{m}{true}}_{p q} - {\overset{m}{true}}_{q p} false) true]

where α q is the volume fraction of the q th phase in discrete volume; ρ q is the density of the q th phase; and m pq and m qp are mass exchange between the q th phase and p th phase. In the tank, the mass exchange was zero.…”

Section: Vof Modelmentioning

confidence: 99%

Optimization of mixing parameters for a cold model system by CFD for aluminum matrix composites synthesis process

Sun

Liu

et al. 2016

Can J Chem Eng

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Stir casting process is the most important method in the aluminum matrix composites synthesis industry. In the stir casting process, the stability of the liquid aluminum surface and the highest shear force induced by the impellers are the two main factors for high quality of aluminum matrix composites synthesis. In this paper, a three‐dimensional CFD model validated on a water and air two‐phase flow system in a cold model was used to optimize the mixing string tank for aluminum matrix composites synthesis, coupling the volume of fluid (VOF) model, the k‐ϵ turbulence model, and the multiple reference frames (MRF) model. Important mixing parameters of the gas‐liquid two‐phase stirred tank such as rotation speed, type of baffles, and angle of rotating impellers were simulated and analyzed in detail. Varieties of speed were investigated to choose the best one. The best stirrer was chosen through analyzing the stability of liquid aluminum and shear force induced by impellers. The results showed that the optimal stirring speed was 180 rpm during studying the surface between liquid and gas. The best baffles with the lowest vortex were obtained through simulation, with dimensions of 50 mm × 20 mm × 350 mm. In order to get the lowest vortex between water and air and the strongest shear force, the blades should be installed at 15° with vertical direction.

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An investigation into fishing boat optimisation using a hybrid algorithm

et al. 2018

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The optimisation of high-speed fishing boats is different from the optimisation of other displacement type vessels as, for high-speed fishing boats, the wave-making resistance decreases while the splashed resistance increases sharply. To reduce fuel consumption and operating costs in the current economic climate, this paper presents a fishing boat optimisation approach using a Computational Fluid Dynamics (CFD) technique. The RANS-VoF solver was utilised to calculate total resistance, sinkage and trim for a fishing boat in calm water. The Arbitrary Shape Deformation (ASD) technique was used to smoothly alter the geometry. A hybrid algorithm was presented to solve the complicated nonlinear optimisation problem. Herein, a Design of Experiments (DoE) method was applied to find an optimal global region and a mathematical programme was employed to determine an optimal global solution. Under the same displacement with the original hull, two optimisation loops were built with different design variables. After completion of the optimisation, two optimal hull forms were obtained. The optimisation results show that the optimisation loop presented in this study can be used to design a suitable fishing boat in the reduction of the total resistance in calm water.

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Numerical simulation of the stokes wave for the flow around a ship hull coupled with the VOF model

Cited by 7 publications

References 14 publications

CFD Analysis of The Heave and Pitch Motion of Hull Mode

CFD Analysis of The Heave and Pitch Motion of Hull Mode

Optimization of mixing parameters for a cold model system by CFD for aluminum matrix composites synthesis process

An investigation into fishing boat optimisation using a hybrid algorithm

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