Numerical simulations of multi-layer-liquid sloshing by multiphase MPS method

2021 ◽  
Vol 33 (5) ◽  
pp. 938-949
Author(s):  
Xiao Wen ◽  
Wei-wen Zhao ◽  
De-cheng Wan
Keyword(s):  
Numerical Simulations ◽  
Liquid Sloshing ◽  
Mps Method

Numerical Simulation of Three-Layer-Liquid Sloshing by Multiphase MPS Method

2018 ◽  
Author(s):  
Xiao Wen ◽  
Decheng Wan
Keyword(s):  
Present Method ◽  
Single Phase ◽  
Particle Interaction ◽  
Liquid Sloshing ◽  
Mps Method ◽  
Basic Particle ◽  
Viscosity Fluid ◽  
Surface Tension Model ◽  
Single Set ◽  
Good Agreement

In the present study, three-layer-liquid sloshing in a rigid tank is simulated based on the newly developed multiphase MPS method. Firstly, the multiphase MPS method is introduced in detail, including the basic particle interaction models and the special interface treatments employed to extend single phase MPS solver to multiphase flows simulations. The new multiphase MPS method treats the multifluid system as the multi-density and multi-viscosity fluid, thus only a single set of equations needs to be solved for all phases. Besides, extra density smoothing technique, interparticle viscosity model and surface tension model are included in the present method for interface particles. The new multiphase MPS method is then applied to simulate three-layer-liquid sloshing in a rigid tank and verified through comparison with the experiment conducted by Molin et al. [1]. The predicted motion of interfaces by the present method shows a good agreement with the experimental data and other numerical results.

Sloshing in LNG Tanks: Assessment of High and Low Pressures

2008 ◽  
Author(s):  
Sebastian Schreier ◽  
Mathias Paschen
Keyword(s):  
High Pressure ◽  
Numerical Simulations ◽  
Liquid Sloshing ◽  
Pressure Impact ◽  
Membrane Type ◽  
Low Pressures

In the assessment of 2D numerical simulations of liquid sloshing in partially filled membrane-type cargo tanks of LNG Carriers high pressure impacts and also particularly low pressures have been identified. One high pressure impact at low filling levels and one sloshing impact leading to particularly low pressures at high filling levels are studied in greater detail. The results of these investigations are presented and conclusions are drawn with respect to the underlying physics of the two phenomena.

Numerical Simulation on Motion Responses of the Tsunami-Induced Grounding on a Wharf of Floating Structures Using the MPS Method

2008 ◽  
Author(s):  
Koichi Masuda ◽  
Tomoki Ikoma ◽  
Mitsuhiro Masuda ◽  
Yuta Suzuki
Keyword(s):  
Numerical Simulation ◽  
Solitary Wave ◽  
Numerical Simulations ◽  
Experimental Results ◽  
Floating Body ◽  
Floating Structures ◽  
Mps Method ◽  
Model Experiments ◽  
Motion Responses ◽  
Moving Particle

The present paper describes the application of the moving particle semi-implicit method to a prediction of tsunami-induced grounding of floating structures in the vicinity of wharfs. Effectiveness of the application is verified. Solitary wave have been applied to simulated tsunamis in numerical simulation and to the model experiments. A pontoon type floating body has been used to floating structures in numerical simulations using the MPS method. The present numerical results have been compared with the experimental results and the applicability of MPS method has been discussed. Further, after the grounding, the characteristics of gliding distance of floating body on the wharf have been discussed.

Numerical Simulation of Multi-Layer-Liquid Sloshing by Multiphase MPS-GPU Method

2020 ◽  
Author(s):  
Xiao Wen ◽  
Xiang Chen ◽  
Decheng Wan
Keyword(s):  
Present Method ◽  
Graphics Processing Unit ◽  
Computational Cost ◽  
Three Dimensional ◽  
Liquid Sloshing ◽  
Processing Unit ◽  
Mps Method ◽  
Acceleration Technique ◽  
Moving Particle ◽  
Graphics Processing

Abstract In this paper, a new multiphase MPS-GPU method is proposed through the combination of moving particle semi-implicit (MPS) method and Graphics Processing Unit (GPU) acceleration technique. The new method not only inherits the advantage of MPS method in capturing complex interface deformations, but also overcomes the limitations of huge computational cost in three-dimensional MPS simulation. By this method, both the two-layer-liquid and three-layer-liquids sloshing problems are simulated three-dimensionally on the GPU device, in which more than one million of particles are included. In simulations, the sloshing patterns of each liquid layer under different external excitations are accurately captured. From the interface elevations and impacting pressures calculated by present method, it is found that an obvious discrepancy exists between the deformations of free surface and phase interfaces. Then, the results obtained by multiphase MPS-GPU method are compared with experimental data and other numerical results in open literature and a good agreement is achieved, which validates the accuracy and applicability of the present method in three-dimensional simulations of multi-layer-liquid sloshing flows.

Comparison Investigations of Numerical Simulations of Incompressible Viscous Flows by SPH and MPS

2010 ◽  
Author(s):  
Yuxin Zhang ◽  
Decheng Wan
Keyword(s):  
Numerical Simulations ◽  
Free Surface Flow ◽  
Viscous Flows ◽  
Surface Flow ◽  
Numerical Results ◽  
Particle Methods ◽  
Test Case ◽  
Sph Method ◽  
Mps Method ◽  
Incompressible Viscous Flows

Comparison investigations of numerical simulations of incompressible viscous flows by the SPH (smoothed particle hydrodynamics) and the MPS (moving particle semi-implicit) are presented. A dam-break problem is chosen as the test case. In the calculation with the SPH method, weakly compressible model is used, i.e. WCSPH, which describes water as a nearly incompressible fluid, while in MPS method, the pressure Poisson equation is introduced to keep the density of fluid to be constant. The numerical results show that the two particle methods are robust and flexible, numerical results qualitatively agree with the experimental data. It can be seen that both the SPH method and the MPS method can be easily applied to the complex free surface flow problems.

Study on Drifting Distance and Collision Force of Floating Vessels Run on Apron by Tsunami

2009 ◽  
Author(s):  
Koichi Masuda ◽  
Takujiro Miyamoto ◽  
Tomoki Ikoma ◽  
Mitsuhiro Masuda
Keyword(s):  
Numerical Simulation ◽  
Solitary Wave ◽  
Numerical Simulations ◽  
Experimental Results ◽  
Floating Body ◽  
Floating Structures ◽  
Mps Method ◽  
Model Experiments ◽  
Moving Particle ◽  
Collision Force

The present paper describes the application of the moving particle semi-implicit method to a prediction of drifting distance and collision force of floating vessels run on wharf by tsunami. Effectiveness of the application is verified. Solitary wave have been applied to simulated tsunamis in numerical simulation and to the model experiments. A pontoon type floating body has been used to floating structures in numerical simulations using the MPS method. The present numerical results have been compared with the experimental results and the applicability of MPS method has been discussed. Further, after the running on wharf by tsunami, the characteristics of drifting distance and collision force of floating body on the wharf have been discussed.

scholarly journals Ship’S Rolling Amplitude as a Significant Factor Influencing Liquid Sloshing in Partly Filled Tanks / Amplituda Kołysań Statku Jako Istotny Parametr W Badaniach Zjawiska Sloshingu W Niepełnych Zbiornikach Okrętowych

2012 ◽  
Vol 21 (1) ◽  
pp. 63-76
Author(s):  
Przemysław Krata ◽  
Wojciech Wawrzyński
Keyword(s):  
Numerical Simulations ◽  
Liquid Sloshing ◽  
Liquid Motion ◽  
Dynamic Approach ◽  
Non Linear ◽  
Heeling Moment

Abstract The study considers ship’s rolling amplitude as one of the key parameters influencing liquid sloshing in partly filled tanks during sea voyage. This issue is strictly related to the safety of navigation matters and belongs to the group of non-linear hydrodynamic phenomena. The presented investigation is focused on the estimation of typical and extreme rolling amplitude of a vessel in terms of dynamic approach towards liquid motion onboard ships. The number of exemplary numerical simulations of liquid sloshing taking place in moving tanks is carried out and the heeling moment due to liquid sloshing is obtained.

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