Simplified CFD modeling for bilge keel force and hull pressure distribution on a rotating cylinder

Ommani, Babak; Kristiansen, Trygve; Faltinsen, Odd M.

doi:10.1016/j.apor.2016.04.010

Cited by 14 publications

(10 citation statements)

References 14 publications

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“…Due to the physical structure of a cylinder, its flow field and force characteristics are affected by several factors, such as the Reynolds number, surface roughness, cylinder size, and turbulence intensity. In many engineering situations (Sedaghat et al 2014;Liang et al 2016;Ommani et al 2016), the cylinders in a structure must be rotated at a certain rate; hence, studying the hydrodynamic performance of a rotating cylinder is a critical endeavor.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Analysis of the Hydrodynamic Performance of a Three-Dimensional Finite-Length Rotating Cylinder

Wang

Zhao

et al. 2020

J. Marine. Sci. Appl.

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The hydrodynamic performance of a three-dimensional finite-length rotating cylinder is studied by means of a physical tank and numerical simulation. First, according to the identified influencing factors, a hydrodynamic performance test of the rotating cylinder was carried out in a circulating water tank. In order to explore the changing law of hydrodynamic performance with these factors, a particle image velocimetry device was used to monitor the flow field. Subsequently, a computational field dynamics numerical simulation method was used to simulate the flow field, followed by an analysis of the effects of speed ratio, Reynolds number, and aspect ratio on the flow field. The results show that the lift coefficient and drag coefficient of the cylinder increase first and then decrease with the increase of the rotational speed ratio. The trend of numerical simulation and experimental results is similar.

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Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Analysis of the Hydrodynamic Performance of a Three-Dimensional Finite-Length Rotating Cylinder

Wang

Zhao

et al. 2020

J. Marine. Sci. Appl.

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“…In Greco et al (2015), the effect of the bilge keel damping on the parametric roll and water-on-deck event of an FPSO was also predicted numerically. In a study by Ommani et al (2016), a horizontal, circular cylinder fitted with one bilge keel was forced to rotate harmonically around its axis. The influence of the draft and amplitude of oscillation on the bilge keel force and hull pressure distribution was considered and compared with the standard empirical method proposed by Ikeda et al (1977).…”

Section: Introductionmentioning

confidence: 99%

Influence of bilge-keel configuration on ship roll damping and roll response in waves

et al. 2020

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“…Ommani et al [20] performed a two-dimensional numerical study on a horizontal, circular cylinder fitted with one bilge keel forced to rotate harmonically around its axis. They used a Navier-Stokes solver based on the Finite Volume Method and simplified the problem by neglecting the influence of nonlinear advection terms and viscous stresses in the freesurface zone.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Calculation of Roll Amplitude Effect on Roll Damping

Yıldız

Şener

Yurtseven

et al. 2019

brod

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Roll motion is still a challenging problem in naval architecture and an adequate prediction of this physical phenomenon is important because of its undesirable effects such as capsizing. There are several methods using linear potential theory to predict roll motion, such as strip method, however, the accuracy of the calculated results lag behind the accuracy of other degrees of freedom due to viscosity. Viscosity have an important effect on roll damping, especially near resonance, and as it is known, it is not included in potential flow methods. Vortex shedding is the main physical phenomena in viscous damping of the roll motion and it affects the flow velocity around the bilge. This may lead to pressure increase or decrease on the hull. In the present study, roll damping of a forced rolling hull with bilge keels at different roll amplitudes was calculated numerically by using an Unsteady Reynolds-averaged Navier-Stokes (URANS) solver. For the purpose of validation, forced roll experiments were carried out and the results were plotted next to numerical results. The generated vortices around the hull and bilge keel were observed in the URANS calculations. In the case of large roll amplitude motion, the vortex shedding from the bilge keel interacts with the free surface and leads to decrease on roll damping.Numerical and experimental calculation of roll amplitude Ahmet Yurtseven, Toru Katayama effect on roll damping

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Simplified CFD modeling for bilge keel force and hull pressure distribution on a rotating cylinder

Cited by 14 publications

References 14 publications

Numerical and Experimental Analysis of the Hydrodynamic Performance of a Three-Dimensional Finite-Length Rotating Cylinder

Numerical and Experimental Analysis of the Hydrodynamic Performance of a Three-Dimensional Finite-Length Rotating Cylinder

Influence of bilge-keel configuration on ship roll damping and roll response in waves

Numerical and Experimental Calculation of Roll Amplitude Effect on Roll Damping

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