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

2021 ◽  
Vol 9 (10) ◽  
pp. 1110
Author(s):  
Lizhu Wang ◽  
Min Xu ◽  
Qian Zhang
Keyword(s):  
Pressure Gradient ◽  
Particle Method ◽  
Liquid Sloshing ◽  
Impact Pressure ◽  
Rotational Excitation ◽  
Damping Effect ◽  
Static Water ◽  
Background Mesh ◽  
Vertical Baffle ◽  
Reasonable Use

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.

scholarly journals Study on liquid sloshing characteristics of a swaying rectangular tank with a rolling baffle

2019 ◽  
Vol 119 (1) ◽  
pp. 23-41 ◽  
Author(s):  
Jing-Han Wang ◽  
Shi-Li Sun
Keyword(s):  
Free Surface ◽  
Present Method ◽  
Velocity Potential ◽  
Solution Procedure ◽  
Liquid Sloshing ◽  
Published Data ◽  
Free Surface Elevation ◽  
Separate Variable ◽  
Rectangular Tank ◽  
Vertical Baffle

Abstract This study addresses the sloshing characteristics of a liquid contained in a tank with a vertical baffle mounted at the bottom of the tank. Liquid sloshing characteristics are studied through an analytical solution procedure based on the linear velocity potential theory. The tank is forced to sway horizontally and periodically, while the baffle is fixed to the tank or rolling around a hinged point. The rectangular tank flow field is divided into a few sub-domains. The potentials are solved by a separate variable method, and the boundary conditions and matching requirements between adjacent sub-domains are used to determine the sole solution. The free surface elevations with no baffle or a low fixed baffle are compared with those in published data, and the correctness and reliability of the present method are verified. Then the baffle is forced to rotate around the bottom-mounted point. It is found that the baffle’s motion, including the magnitude and the phase together, can be adjusted to suppress the free surface elevation, and even the sloshing wave can be almost eliminated.

Fluid-Structure Interaction of Liquid Sloshing Induced by Vessel Motion in Floating LNG Tank

2015 ◽  
Author(s):  
David Jia ◽  
Madhusuden Agrawal ◽  
Chaojun Wang ◽  
Joanne Shen ◽  
Jim Malachowski
Keyword(s):  
Dynamic Stress ◽  
Scaling Law ◽  
Liquid Sloshing ◽  
Impact Pressure ◽  
Normal Operation ◽  
Ship Motions ◽  
Structural Domain ◽  
Resonant Vibration ◽  
Lng Tank ◽  
Vessel Motion

Liquid sloshing in Floating LNG tank could potentially cause strength issue, resonant vibration and fatigue damage of the tank structures. An FSI approach is used in this paper to provide solutions in both fluid domain and structural domain. The dynamic stresses from the solutions can be used to potentially address the three critical issues in floating LNG tank design. The first one is the strength of the tank structure under the peak impact loads. The second one is the resonant vibration when the excitation from the ship motion is near the natural frequencies of the LNG tank. The third one is the tank structure fatigue under dynamic loads that is caused by liquid sloshing due to ship motions even in the normal operation. In this paper, an FSI approach is used for modeling liquid sloshing induced by vessel motion in a FLNG tank. The scaling law [1] is used in the simulation to reduce the size of the model. Transient Computational Fluid Dynamics (CFD) is coupled with transient Computational Structural Dynamics (CSD). The gas and liquid inside tank are modelled with Volume of Fluid (VOF) theory. The FSI modeling can be potentially used to assess strength, vibration and fatigue in FLNG tanks due to liquid sloshing. The FSI results show vessel motions significantly affect impact pressure and dynamic stress on the tank. FSI can capture coupled physics of vessel motions, sloshing, impact pressure, and dynamic stress on the tank.

Liquid Sloshing Problem in a Concrete Rectangular LSS with a Vertical Baffle

2018 ◽  
Vol 44 (5) ◽  
pp. 4245-4256 ◽  
Author(s):  
Xuansheng Cheng ◽  
Wei Jing ◽  
Lijun Gong
Keyword(s):  
Liquid Sloshing ◽  
Vertical Baffle

scholarly journals ESTIMATION OF TSUNAMI WAVE IMPACT PRESSURE ON RIVER STRUCTURES BY AN IMPROVED PARTICLE METHOD

2014 ◽  
Vol 70 (4) ◽  
pp. I_605-I_615
Author(s):  
Takaaki ABE ◽  
Yoshishige SATOH ◽  
Yasuhiro YOSHIKAWA ◽  
Akashi ITOH ◽  
Toshiyuki Ootsuki ◽  
...  
Keyword(s):  
Tsunami Wave ◽  
Particle Method ◽  
Impact Pressure ◽  
Wave Impact

Numerical Simulation of 3D Liquid Sloshing Motion With Solid Particles Using Finite Volume Particle Method

2010 ◽  
Author(s):  
LianCheng Guo ◽  
Shuai Zhang ◽  
Koji Morita ◽  
Kenji Fukuda
Keyword(s):  
Solid Particle ◽  
Finite Volume ◽  
Liquid Mixture ◽  
Particle Method ◽  
Solid Particles ◽  
Liquid Sloshing ◽  
Particle Methods ◽  
3D Motion ◽  
Sloshing Dynamics ◽  
Moving Particle

Sloshing dynamics of a molten core is one of the fundamental behaviors in core disruptive accidents of a liquid-metal cooled reactor. In addition, solid particle-liquid mixture comprising molten fuel, molten structure, refrozen fuel, solid fuel pellets, etc. could lead to damping of its flowing process in a disrupted core. The objective of the present study is to investigate the applicability of the finite volume particle method (FVP), which is one of the moving particle methods, to 3D motion of liquid sloshing processes measured in a series of experiments. In the first part of this study, a typical sloshing experiment of single liquid phase is simulated to verify the present 3D FVP method for sloshing characteristics that include free surface behaviors. Second, simulations of sloshing problems with solid particles are performed to validate the applicability of the FVP method to the 3D motion of solid particle-liquid mixture flows. Some good agreements between the simulation and its corresponding experiment demonstrate applicability of the present FVP method to 3D fluid dynamics of liquid sloshing flow with solid particles.

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