Numerical Studies of Coupling Effect of Sloshing on 3D Ship Motions

Saripilli, Jai Ram; Sen, Debabrata

doi:10.17736/ijope.2017.jc677

Cited by 8 publications

(2 citation statements)

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“…Armenio et al [6,7] and Li et al [8] independently developed coupled numerical models based on computational fluid dynamics (CFD) for the coupled effects. After Li et al [8], many studies have been conducted on this topic in recent years (e.g., Huang et al [9], Taskar et al [10], Jiang et al [11], Cercos-Pita et al [12], Ghamari et al [13], Saripilli and Sen [14], Bulian and Cercos-Pita [15], Diebold et al [16], Alujević et al [17], Lyu et al [18], Zhuang and Wan [19], Alujević et al [20], Subramanian et al [21], Wei et al [22], Bernal-Colio et al [23], Liu et al [24], Yao et al [25], He et al [26], Lin et al [27], Liu et al [28], Lyu et al [29], Sun et al [30], Wen et al [31], Yu et al [32], Chen et al [33], Chen et al [34], Ge et al [35], Kapsenberg and Carette [36], Lee et al [37], Lin et al [38], and Wang et al [39]). However, the dynamics of the ships and floating caissons are different.…”

Section: Introductionmentioning

confidence: 99%

Development of Coupled Numerical Model between Floating Caisson and Anti-Oscillation Tanks

Shirai,

Nakamura,

Cho

et al. 2023

JMSE

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Floating caissons can oscillate owing to ocean waves when towed to an installation site. To reduce these oscillations, free-surface anti-oscillation tanks mounted on floating caissons have been proposed. However, no coupled numerical model exists between the motion of the floating caisson and fluid flow in the tanks based on computational fluid dynamics (CFD). In this study, a coupled model is developed and compared to existing physical experiments for validation. In the coupled model, the vertical and rotational motion of the floating caisson are computed as a rigid body, and the motion of the free water in the tank is computed using a CFD model. Numerical results show the predictive capability of the coupled model in terms of the rotational motion (pitch) of the floating caisson within ±20% of experimental data, regardless of the absence or presence of water in the tank. The numerical results also show that the fluid flow with complex air–water interface motion in the tank can be analyzed in detail using the coupled model. This suggests that the coupled model developed in this study is a useful tool for quantitatively assessing the effectiveness of an anti-oscillation tank for reducing the pitch of a floating caisson.

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Section: Introductionmentioning

confidence: 99%

Development of Coupled Numerical Model between Floating Caisson and Anti-Oscillation Tanks

Shirai,

Nakamura,

Cho

et al. 2023

JMSE

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show abstract

“…Therefore, volume of fluid (VOF) method (Hirt and Nichols, 1981) is considered to solve the surface in tanks. Using CFD method to solve interior tank sloshing had been studied by Saripilli and Sen, 2017a;Sen and Saripilli, 2017b;Li et al (2012) and Jiang et al (2015). In these works, the inner fields are analyzed by a CFD open source toolbox OpenFOAM, while external fields are analyzed by potential theories.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of ship motion fully coupled with sloshing tanks by naoe-FOAM-SJTU solver

Zhuang

Wan

2019

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Purpose The purpose of this paper is to verify the ability of our in-house solver naoe-FOAM-SJTU to solve the problem of exterior fluid field coupled with interior fluid field and discover the coupling effects between exterior field (ship motion) and interior field (sloshing tanks). Design/methodology/approach The solving equation is based on Navier–Stokes equation, by comparing two turbulence models [laminar model and Reynolds-averaged Navier–Stocks (RANS)], of which RANS model are chosen to do the simulation. A unified approach is adopted to simulate exterior and interior fields simultaneously, keeping the pressure and velocity the same in external and internal fields. By adding a new function of calculating forces on different patches, the inner sloshing moments and external wave exciting moments can be output. Findings The in-house solver naoe-FOAM-SJTU had the ability to simulate this problem and showed well agreement with experimental results. By considering ship motion with and without sloshing, it was figured that with the existence of sloshing tank, the ship natural frequency will be changed. When the two tank fillings are the same, there will be another roll peak appeared, which is natural frequency of sloshing tanks. Considering wave height and different filling influence, the nonlinearity of sloshing in tank may give non-proportional response to ship motion. Practical implications With the ability to simulate well, the reality reference in the progress of FPSO or FLNG operation is obtained. Originality/value The value of this paper is a fully coupled CFD method which is adopted to solve the coupling effects, showing the ability to do the work well. It gives a referenced detailed information of inner and outer fluid field. Meanwhile, it carried out the impact pressure and damping force around the ship, which indicates the practical information in operations.

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Parametric and Autoparametric Dynamics of Ships with Liquid Sloshing Interaction

Ibrahim

2019

Springer Proceedings in Physics

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Numerical Studies of Coupling Effect of Sloshing on 3D Ship Motions

Cited by 8 publications

References 0 publications

Development of Coupled Numerical Model between Floating Caisson and Anti-Oscillation Tanks

Development of Coupled Numerical Model between Floating Caisson and Anti-Oscillation Tanks

Numerical simulation of ship motion fully coupled with sloshing tanks by naoe-FOAM-SJTU solver

Parametric and Autoparametric Dynamics of Ships with Liquid Sloshing Interaction

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