Experimental study on the effect of centrally positioned vertical baffles on sloshing noise in a rectangular tank

Golla, Siva Teja; Venkatesham, B

doi:10.1016/j.apacoust.2020.107890

Cited by 15 publications

(4 citation statements)

References 14 publications

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“…The variation trends of resonance frequency for different baffle heights in Figure 10 is consistent with the phenomenon reflected from the sloshing noise investigation by Golla and Venkatesham [1]. The result indicates that at least when the baffle top reaches the free surface, the baffle has the function of changing the scale of the tank, and then alters resonance characteristics.…”

Section: Discussionsupporting

confidence: 84%

“…Liquid sloshing is a common phenomenon in the transportation of liquid cargo ships. When the frequency of the external load is close to the resonance frequency of the tank, the sloshing is extremely violent [1][2][3][4]. The force generated by violent sloshing would lead to the instability of ships, and the impact pressure on the tank wall could damage the tank structure, leading to the leakage of liquid.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Shallow Liquid Sloshing in a Baffled Tank and the Associated Damping Effect by BM-MPS Method

Wang

Zhang

2021

JMSE

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Understanding the damping mechanism of baffles is helpful to make more reasonable use of them in suppressing liquid sloshing. In this study, the damping effect and mechanism of vertical baffles in shallow liquid sloshing under a rotational excitation are investigated by an improved particle method. By incorporation of a background mesh scheme and a modified pressure gradient model, the accuracy of impact pressure during sloshing is significantly enhanced. Combined with the advantages of the particle method, the present numerical method is a wonderful tool for the investigation of liquid sloshing issues. Through the analysis of impact pressure, the influences of baffle height and baffle position on the damping mechanism are discussed. The results show that the damping effect of vertical baffles increases with the increase of the elevation of baffle top and decreases with the increase of the elevation of the baffle bottom. Moreover, the resonance characteristics of sloshing are altered when static water is divided into two parts by the vertical baffle. The dominant damping mechanism of vertical baffles depends on the configurations.

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Section: Discussionsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Shallow Liquid Sloshing in a Baffled Tank and the Associated Damping Effect by BM-MPS Method

Wang

Zhang

2021

JMSE

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“…Liquid sloshing in fuel tanks is common phenomenon in ship navigation, which adversely affects the stability of the vessel and poses a threat to human safety [1][2][3][4]. With the increasing demand for liquefied natural gas (LNG) and liquefied petroleum gas (LPG), there has been a rapid development in large-scale liquid cargo ships.…”

Section: Introductionmentioning

confidence: 99%

Study on the Damping Effect and Mechanism of Vertical Slotted Screens Based on the BM-MPS Method

Zhang

Wang

2023

JMSE

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Liquid sloshing is a common phenomenon in ocean engineering, and one which not only affects the stability of ship navigation, but also poses a threat to both the marine environment and human life. Ascertaining how best to reduce the amplitude of liquid sloshing has always been a key problem in ocean engineering. In this study, based on an improved moving-particle semi-implicit method, the BM-MPS method, the damping effect of a vertical slotted screen under rotation excitation was simulated and studied, and the influence of baffle porosity and the rotation amplitude on the resonance period and impact pressure was discussed. The results showed that the porosity had an obvious effect on the resonance period. A significant resonance period transformation happened when the porosity was 0.1, but a porosity of 0.15 was the point at which the maximum impact pressure in the resonance was at its minimum. Meanwhile, the impact duration curve was related to porosity. With the increasing of porosity, the impact duration curve changed from having no peak to a single peak, and then to double peak. In addition, the amplitude of rotation excitation was also one of the factors that affected the resonance period.

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“…Slosh is a term that often refers to a seemingly chaotic flow of two fluids, usually a liquid and a gas, within a containment structure such as a tank. Common occurrences of slosh are within the fuel tanks of passenger vehicles [1], commercial aircraft [2][3][4], spacecraft [5,6] or in tanker vessels transporting liquefied natural gas [7,8]. The resulting slosh forces are an important consideration in the structural design of tanks as well as the dynamics and control of the vehicles carrying them [4,9].…”

Section: Introductionmentioning

confidence: 99%

Embedded One-Dimensional Orifice Elements for Slosh Load Calculations in Volume-Of-Fluid CFD

Botha

Malan

2022

Applied Sciences

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For CFD liquid sloshing simulations, fine computational mesh resolutions are typically required to model the flow within small flow passages or orifices found in fuel tanks. This work presents a method of replacing the fine computational mesh elements within orifices with large one-dimensional mesh elements that integrate seamlessly with standard finite volume computational elements with the intended advantage of reducing the overall computational cost of CFD simulations. These one-dimensional elements conserve mass and momentum for two-phase flow in incompressible Volume-Of-Fluid CFD. Instead of fully resolving the momentum diffusion term, empirical correlations are used to account for the viscous losses within the orifices for both two- and three-dimensional simulations. The one-dimensional orifice elements are developed and validated against analytical and experimental results using the finite volume CFD code Elemental®. Furthermore, these elements are tested in a violent sloshing simulation and compared with full-resolution numerical results as well as experimental results. The elements are shown to decrease computational cost significantly by reducing the number of computational elements as well as increasing the simulation time step sizes (due to an increase in element sizes).

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Experimental study on the effect of centrally positioned vertical baffles on sloshing noise in a rectangular tank

Cited by 15 publications

References 14 publications

Numerical Investigation of Shallow Liquid Sloshing in a Baffled Tank and the Associated Damping Effect by BM-MPS Method

Numerical Investigation of Shallow Liquid Sloshing in a Baffled Tank and the Associated Damping Effect by BM-MPS Method

Study on the Damping Effect and Mechanism of Vertical Slotted Screens Based on the BM-MPS Method

Embedded One-Dimensional Orifice Elements for Slosh Load Calculations in Volume-Of-Fluid CFD

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