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This paper examines the movement of waves that occur in a fuel tank—both with and without a wave breaker—when a car is travelling at a constant speed and then suddenly brakes. This phenomenon is known as slosh noise, and the paper presents an analysis of the movement of free surfaces in relation to the level of noise generated. The paper focuses on mathematical models of the fluid flow for both tanks—one without any technical solutions for breaking waves, and the other with a solution for breaking waves. The model is constructed based on a set of initial hypotheses about the fluid flow within the tank, by developing the speed potential in a series of fundamental solutions and considering the main variables that affect the phenomenon of sloshing, such as the depth of the liquid, the tank’s geometry, and the frequency and amplitude of the initial external force acting on the tank. The analysis of free surface movement is used to find the correlation with the sound generated in the tank. Nonlinearities that arise from the sudden braking are also modelled and numerically studied using MATLAB software. Following the mathematical model, a technical wave-breaking solution was implemented and tested, and it was shown that the amplitude of the movement of the free surface is reduced by half. Further research on the correspondence between the free surface movement based on the behaviour of potential energies in the two cases may be developed.

Conventional liquefied natural gas (LNG) cargo vessels are imposed with tank-fill limitations as precautions to prevent structural damage and stability-loss due to high-impact sloshing, enforcing cargo volume-fills to be lower than 10% or higher than 70% of the tank height. The restrictions, however, limit commercial operations, specifically when handling spot trades and offshore loading/unloading at multiple ports along a shipping route. The study puts forward a computational fluid dynamic (CFD) sloshing analysis of partially-filled chamfered rectangular tanks undergoing sinusoidal oscillatory kinetics with the use of the explicit volume-of-fluid and non-iterative time-advancement schemes. Establishing a 20% to 60% fill-range, the sloshing dynamics were acknowledged within an open-bore, partitioned, and perforated-partitioned tank when oscillating at frequencies of 0.5 Hz and 1 Hz. The overall torque and static pressure induced on the tank walls were investigated. High-impact slamming at the tank roof occurred at 40% and 60% fills, however, the implementation of the partition and perforated-partition barriers successfully reduced the impact due to suppression and dissipation of the wave dynamics.

In this study, a new type of tank roof form is suggested to reduce the high impact forces caused by sloshing. Using this roof allows the tank designers to consider less freeboard, which is economically valuable. For this purpose, an experimental investigation has been implemented to evaluate the efficacy of the proposed roof to distribute the contained liquid impact forces in several time stages. In these experimental measurements, a series of shaking table tests are conducted for a partially filled tank under harmonic and various earthquake excitations for both typical and proposed tank roof forms. The liquid impact forces are reasonably evaluated and compared for both types of tank roof. The efficacy of the proposed roof design is validated by experimental results and it is shown that the sloshing loads can significantly be reduced up to an average of 50% for the dimensions considered in the experiments.

The main topic of the paper is dimensioning steel liquid storage tank, rectangular in shape, with three compartments. Depending on the investor's request (dimensions required for the tank and maximum use of space) a need arose for structure with atypical shape. Austenitic stainless steel is used in this example what is recommended for use in aggressive environments. Dimensioning of steel plates, stiffened and unstiffened, according to Eurocode is carried out according to EN 1993-1-7, which refers to plates loaded out of their plane. Within the first part of the analysis dimensioning is performed according to Eurocode 3. The second part of the paper represents comparative analysis of results obtained according to Eurocode and results obtained using previous domestic standard SRPS.MZ.3. 054. (1981).

Ground-supported tanks are used to store a variety of liquids. During earthquake activity the liquid exerts impulsive and convective pressures (sloshing) on the walls and bottom of the rectangular tank. This paper provides theoretical background for analytical calculating of circular frequencies and hydrodynamic pressures developed during an earthquake in rectangular container. Analytical results of first natural frequency are compared with experiment.

A study on sloshing characteristics in a rectangular tank, which is horizontally excited with a specific range of the Reynolds number, is approached numerically. The nonlinearity of sloshing flow is confirmed by comparing it with the linear solution based on the potential theory, and the time series results of the sloshing pressure are analyzed by Fast Fourier Transform (FFT) algorithm. Then, the pressure fluctuation phenomena are mainly observed and the magnitude of the amplitude spectrum is compared. The results show that, when the impact pressure is generated, large pressure fluctuation in a pressure cycle is observed, and the effects of the frequencies of integral multiples when the fundamental frequency appears dominantly in the sloshing flow.

Sloshing dapat diartikan sebagai gerakan bebas dari fluida cair di dalam sebuah wadah . Masalah sloshing menjadi fenomena penting dalam tangki muatan cair, karena dapat menyebabkan kerusakan pada struktur dalam tangki . paper ini menjelaskan pengaruh besarnya pressure pada tangki kotak dengan dan tanpa penambahan pelat memanjang (baffle) ketika terjadi sloshing yang diakibatkan gerakan rolling yang terjadi pada kapal. Pemodelan tangki dilakukan 2D berbentuk tanki kotak (rectangular tank) dengan ukuran panjang 46.92 m dan tinggi 32.23 m menggunakan software gambit,. variasi model tangki ada 2 yaitu tanpa dan dengan penambahan 1 buah baffle dengan ukuran tebal 1 m dan tinggi 6 m dengan ketinggian cairan 15%, 45%, dan 75%. Proses simulasi dilakukan dengan meode Computational Fluid Dynamic (CFD) menggunakan software Fluent. Dari hasil simulasi dapat disimpulkan bahwa baffle berhasil berfungsi sebagai peredam pressure ketika volume muatan lebih rendah dari tinggi baffle yaitu dalam hal ini volume 15%, namun ketika pada volume muatan 45% dan 75% baffle tidak dapat berfungsi sebagai peredam pressure karena adanya baffle dapat menimbul gaya permukaan cairan ketika cairan lng menghantam baffle yang menyebabkan tinggi cairan lng menjadi lebih tinggi sehingga ketika terjadi gerakan tangki maka dapat menambah besar pressure untuk menghantam dinding-dinding tangki.