SPH method for long-time simulations of sloshing flows in LNG tanks

Pilloton, C.; Bardazzi, Andrea; Colagrossi, A.; Marrone, S.

doi:10.1016/j.euromechflu.2022.01.002

Cited by 16 publications

(3 citation statements)

References 40 publications

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“…In this condition, an appropriate prediction of the impulsive loads and their duration can be useful for an adequate estimate of the fluid-structure interactions (see e.g. Marrone et al 2017;Fang et al 2022;Pilloton et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Different scenarios in sloshing flows near the critical filling depth

Bardazzi,

Lugni,

Faltinsen

et al. 2024

J. Fluid Mech.

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In the present paper, the sloshing flow in a cuboid tank forced to oscillate horizontally is investigated with both experimental and numerical approaches. The filling depth chosen is $h/L=0.35$ (with h the water depth and L the tank height), which is close to the critical depth. According to Tadjbakhsh & Keller (J. Fluid Mech., vol. 8, issue 3, 1960, pp. 442–451), as the depth passes through this critical value the response of the resonant sloshing dynamics changes from ‘hard spring’ to ‘soft spring’. The experimental tank has a thickness of $0.1L$ , reducing three-dimensional effects. High-resolution digital camera and capacitance wave probes are used for time recording of the surface elevation. By varying the oscillation period and the amplitude of the motion imposed on the tank, different scenarios are identified in terms of free-surface evolution. Periodic and quasi-periodic regimes are found in most of the frequencies analysed but, among these, sub-harmonic regimes are also identified. Chaotic energetic regimes are found with motions of greater amplitude. Typical tools of dynamical systems, such as Fourier spectra and phase maps, are used for the regime identification, while the Hilbert–Huang transform is used for further insight into doubling-frequency and tripling-period bifurcations. For the numerical investigation, an advanced and well-established smoothed particle hydrodynamics method is used to aid the understanding of the physical phenomena involved and to extend the range of frequencies investigated experimentally.

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Section: Introductionmentioning

confidence: 99%

Different scenarios in sloshing flows near the critical filling depth

Bardazzi,

Lugni,

Faltinsen

et al. 2024

J. Fluid Mech.

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“…Furthermore, coupled δ-SPH with the smoothed finite element method (SFEM) was carried out by Zhang et al, [25]. Long-time simulation of sloshing in LNG tanks recently carried out by Pilloton et al, [26].The study shows SPH one of particle method that has a good accuracy for capture discontinuities and large-deformation.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Sloshing with Vertical and Horizontal Baffle in the Prismatic Tank using Meshfree CFD

Trimulyono

Gultom

Hadi

et al. 2023

CFDL

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Sloshing is a phenomenon where the tank experiences an external oscillating motion due to the interaction of fluid with tank. The most appropriate way to prevent instability from the sloshing movement is to add baffles or anti-sloshing. This paper was conducted with the 3D simulation of sloshing roll motion on the prismatic tank with a simulation time of 28 seconds. Vertical and Horizontal baffles were used to mitigate sloshing in the prismatic tank. The ratio of baffle height and water depth is 0.7, 0.8 and 0.9. Moreover, horizontal baffle position is 0.1, 0.2, 0.3, and 0.4 respectively, with the tank filling water ratio is 25%. The numerical study was carried out using meshfree CFD, i.e., Smoothed Particle Hydrodynamics. In addition, advanced post-processing was conducted with Blender. The aims of this study were found out the effective baffle configuration to reduce sloshing using vertical and horizontal in the prismatic tank. The results showed the most effective baffle variation for roll motion is 0.9 for vertical baffle and a horizontal baffle height is 0.1 from the water surface. It showed baffles effectively reduces dynamic pressure, hydrodynamic force and free surface deformation

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“…The study revealed that SPH well reproduced the sloshing phenomena regarding surface elevations and forces on the tank. Sloshing inside a ship's LNG fuel tank was conducted in 3 hours duration in real-time and could provide reasonable local pressure estimations [5]. Multi-phase flow sloshing was performed with δ-SPH and particle shifting technique [6], and a similar study was conducted with a prismatic tank for two and three dimensions of twophase SPH [7,8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Sloshing in Different Tank Shapes using Smoothed Particle Hydrodynamics

Andi Trimulyono,

Suci Utami,

Deddy Chrismianto

et al. 2023

CFDL

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Sloshing is the violent motion of a resonant fluid in a moving tank; when the fluid moves and interacts with the tank, the dynamic pressure from such an interaction can cause large fluid deformations with tank walls. In this study, a 3D numerical simulation of sloshing was carried out with five variations of the tank model, i.e., prismatic, rectangular, tube, spherical, and the new model tank with a filling ratio of 25% and 50%. Forced oscillation motion in a roll used frequencies 1.04 Hz and 1.34 Hz. The amplitude of movement was 8.66°. One pressure sensor was used to measure dynamic pressure in the mid of the tank. Because sloshing deals with large deformation and discontinuities, the particle method was suitable for the application. This study used smoothed particle hydrodynamics based on weakly compressible SPH (WCSPH). SPH is a Lagrangian meshless method known as mesh-free computational fluid dynamics. Open-source SPH solver version 5.0 was used to reproduce sloshing in different tank shapes; in addition, advanced visualization was performed using the VisualSPHysics add-on in Blender version 2.92. The sloshing visualization is more realistic and attractive than conventional SPH post-processing. The results of this study indicate that different tank shapes influence reducing the value of dynamic pressure and hydrodynamic force. It is found that a practical tank shape is a tube tank and a new model tank with a reduced dynamic pressure value of 9% and 11% and a reduced hydrodynamic force value of 36% and 48%.

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SPH method for long-time simulations of sloshing flows in LNG tanks

Cited by 16 publications

References 40 publications

Different scenarios in sloshing flows near the critical filling depth

Different scenarios in sloshing flows near the critical filling depth

Investigation of Sloshing with Vertical and Horizontal Baffle in the Prismatic Tank using Meshfree CFD

Investigation of Sloshing in Different Tank Shapes using Smoothed Particle Hydrodynamics

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