A Calculation Method for the Sloshing Impact Pressure Imposed on the Roof of a Passive Water Storage Tank of AP1000

Lu, Daogang; Zeng, Xiaojia; Dang, Junjie; Liu, Yu

doi:10.1155/2016/1613989

Cited by 6 publications

(5 citation statements)

References 13 publications

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“…Several nondimensional numbers such as the Reynolds number, Froude number, Mach number, and Weber number have been used for developing scale models and obtaining suitable experimental conditions. e Froude number, which is de ned as the ratio of ow inertia (F i ) to gravity (F g ) in continuum mechanics, has been used for studying uid behavior using scale models [14,23,24]: inertia force gravity force…”

Section: Discussionmentioning

confidence: 99%

Investigation of the Equivalent Test Condition for the Seismic Safety Assessment of a Spent Fuel Pool with regard to Sloshing Behavior

Park¹,

Son²,

Choi³

et al. 2019

Science and Technology of Nuclear Installations

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Spent fuel pools are used as temporary storage for spent fuel assemblies in nuclear power plants and are filled with coolant which removes the decaying heat from spent fuel assemblies. Sloshing of the coolant can occur if an earthquake occurs in the area. It may produce additional forces on the pool or inner structure and cause overflow of the coolant. It is therefore critical to investigate the phenomenon of sloshing in a seismic assessment of the spent fuel pool. The size of an actual spent fuel pool is excessive for carrying out an experimental study; thus, a scale model is necessary for experimentation. In this study, a scaling law was defined for test conditions using a scale model to understand sloshing behavior, and the results were validated via computational fluid dynamic analysis. Because sloshing is resonant in a fluid and the first mode natural frequency of a fluid is dominant in sloshing behavior, the test condition could be obtained based on the natural frequency of the fluid. In the model, which is scaled with a factor of “Sf,” the scale factors “Sf,” “Sf0,” “Sf−0.5,” and “Sf0.5” were used for displacement, acceleration, excitation frequency, and excitation time, respectively. Approximately 5% difference in maximum sloshing height between two models was predicted in the only case that 1/8 and 1/4 models (1/8 and 1/4 scaled down from an actual spent fuel pool) were excited with 10 Hz and 7.071 Hz, respectively, but the same sloshing height and pressure were predicted in other cases. The results of this study support the idea that the Froude scaling law can be used when using a scale model for a seismic assessment of spent fuel pools to investigate sloshing behavior.

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Section: Discussionmentioning

confidence: 99%

Investigation of the Equivalent Test Condition for the Seismic Safety Assessment of a Spent Fuel Pool with regard to Sloshing Behavior

Park¹,

Son²,

Choi³

et al. 2019

Science and Technology of Nuclear Installations

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show abstract

“…Experimental studies are necessary to confirm theoretical and computational investigations. Several experimental studies have proposed aimed to investigate sloshing effects and impact pressures [6][7][8][9][10]. Sloshing analysis is a complex problem that requires both experimental and numerical investigations to obtain accurate results.…”

Section: Introductionmentioning

confidence: 99%

The CFD Computation and Validation of Effects of Adaptive Mesh Refinement in Sloshing Simulation in A Narrow Tank

Sayak,

Uslu

2023

Proceedings of the 9th World Congress on Mechanical, Chemical, and Material Engineering

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Strong and precise computational methods are necessary to discover and understand undesirable effects in tanks where liquids slosh, known as sloshing. Sloshing is important for many industrial applications, such as fuel tanks in ships, aircraft, and other transport vehicles. Numerical methods are commonly used in modelling sloshing behaviour, and adaptive mesh refinement (AMR) technology is an effective method used to increase numerical accuracy in sloshing simulations. The primary objective of this research is to conduct Computational Fluid Dynamics (CFD) calculations of sloshing phenomena to establish a methodology for observing the undesirable effects on the relevant system and assess the effectiveness of adaptive mesh refinement by comparing the results of surface impact pressures with experimental case results from literature. A 3D model of a rectangular tank partially filled with water is used to simulate the impact pressure caused by roll motion. The roll motion is based on experimental data and occurs at periods close to the tank's internal wave resonance period. The pressure results are observed from a single monitoring point. Numerical studies are performed using Star CCM+ software. The Volume of Fluid (VOF) based Eulerian method is utilised to model the free surface flow. The study demonstrates the ability of AMR to accurately model sloshing behaviour and compares fixed and AMR grids at different levels. Finally, the results of fixed and adaptive cartesian grids are compared and verified with corresponding experimental data. The results showed that the AMR grid provided higher numerical accuracy, lower computational cost and allowed for more accurate modelling of sloshing behaviour. It is emphasised that the importance of AMR for understanding sloshing behaviour and modelling it accurately.

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“…[34][35][36] Livaoglu and Dogangun have presented the possibilities of idealization of the tank-subsoil interaction problem. [37][38][39][40][41] The knowledge of the fluid behavior, sloshing without/with roof, and sloshing impact in roofed tanks, is needed for the safety design of the tanks. 42,43 Despite the efforts to establish standards for reliable fluid reservoir design, reservoir damage still occurs today.…”

Section: Introductionmentioning

confidence: 99%

“…The soil–structure interaction analysis contains a wide range of idealizations 34–36 . Livaoglu and Dogangun have presented the possibilities of idealization of the tank–subsoil interaction problem 37–41 …”

Section: Introductionmentioning

confidence: 99%

Pressure and stress analysis of liquid‐filled cylindrical tank

Kotrasová

Kormaníková

Bašková

2021

Math Methods in App Sciences

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During earthquakes, the liquid‐filled storage tank generates hydrodynamic pressures, in addition to hydrostatic pressure, on the solid domain of the tank. The theoretical background of hydrodynamic pressure analysis, as well as the numerical simulation of the liquid‐filled cylindrical steel reinforced concrete tank, is the focus of this paper. The finite element method (FEM) modeling, along with arbitrary Lagrangian–Eulerian and fluid–structure interactions formulation, is used for simulating the seismic response of cylindrical steel reinforced concrete liquid‐filled tank, fixed to the rigid foundation. The Loma Prieta accelerogram is utilized for recording the seismic ground motion. In the numerical study, two states are observed: (1) static condition where only hydrostatic pressure acts and (2) seismic excitation where hydrodynamic pressure occurs. When exposed to an earthquake situation, the tank liquid gives the total pressure of the liquid domain. The dynamic analysis considers the pressure response of the liquid domain, as well as the stress response of the solid domain of the coupled system, that is, liquid‐filled cylindrical steel reinforced concrete tank.

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A Calculation Method for the Sloshing Impact Pressure Imposed on the Roof of a Passive Water Storage Tank of AP1000

Cited by 6 publications

References 13 publications

Investigation of the Equivalent Test Condition for the Seismic Safety Assessment of a Spent Fuel Pool with regard to Sloshing Behavior

Investigation of the Equivalent Test Condition for the Seismic Safety Assessment of a Spent Fuel Pool with regard to Sloshing Behavior

The CFD Computation and Validation of Effects of Adaptive Mesh Refinement in Sloshing Simulation in A Narrow Tank

Pressure and stress analysis of liquid‐filled cylindrical tank

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