Numerical simulation of wave-induced nonlinear motions of a two-dimensional floating body by the moving particle semi-implicit method

2008 ◽  
Vol 13 (2) ◽  
pp. 85-94 ◽  
Author(s):  
Makoto Sueyoshi ◽  
Masashi Kashiwagi ◽  
Shigeru Naito
Keyword(s):  
Numerical Simulation ◽  
Implicit Method ◽  
Floating Body ◽  
Two Dimensional ◽  
Moving Particle ◽  
Wave Induced ◽  
Nonlinear Motions

scholarly journals NUMERICAL SIMULATION OF TSUNAMI CURRENTS

2011 ◽  
Vol 1 (32) ◽  
pp. 6 ◽  
Author(s):  
Eizo Nakaza ◽  
Tsunakiyo Iribe ◽  
Muhammad Abdur Rouf
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Open Channel ◽  
Implicit Method ◽  
Simulation Results ◽  
Moving Particle ◽  
Fixed Structure ◽  
Tsunami Currents

The paper aims to simulate Tsunami currents around moving and fixed structures using the moving-particle semi-implicit method. An open channel with four different sets of structures is employed in the numerical model. The simulation results for the case with one structure indicate that the flow around the moving structure is faster than that around the fixed structure. The flow becomes more complex for cases with additional structures.

Effects of Wall Condition of a Plunging Body on Splash

2011 ◽  
Author(s):  
Masao Yokoyama ◽  
Yoshihiro Kubota ◽  
Osamu Mochizuki
Keyword(s):  
Numerical Simulation ◽  
Implicit Method ◽  
Water Tank ◽  
Air Cavity ◽  
Slip Ratio ◽  
Mps Method ◽  
Swelling Degree ◽  
Living Things ◽  
Wall Condition ◽  
Moving Particle

Splashes generated by hydrogel sphere were simulated numerically and experimentally for investigating the effects of slip like mucus of living things. Numerical simulation using MPS (Moving Particle Semi-implicit) method was carried out. We defined the slip ratio as the swelling degree of hydrogel and installed the slip ratio into the MPS method. The swelling degree is the ratio of the weight of water against that of hydrogel. We simulated the splashes generated by the hydrogel spheres which had the different swelling degree plunging into water. As the evaluation of swelling degree on the surface of actual hydrogel spheres we also tested by using the hydrogel spheres plunging into water experimentally. The height of splash as a result of reaction of the air cavity became higher according to the increase of the swelling degree. The speed of hydrogel sphere sinking in water tank was also quicker in the numerical simulation. The reason of these results was that the velocity of water around the hydrogel sphere became quicker due to the slip on the surface.

Numerical simulation of droplet sliding on an inclined surface using moving particle semi-implicit method

2018 ◽  
Vol 5 (4) ◽  
pp. 477-491
Author(s):  
Tsuyoshi Hattori ◽  
Masaharu Sakai ◽  
Shigeru Akaike ◽  
Seiichi Koshizuka
Keyword(s):  
Numerical Simulation ◽  
Implicit Method ◽  
Moving Particle ◽  
Inclined Surface

Study on Collision Forces on Water-Front Facilities Induced by Floating Vessels Washed Onto Apron by Tsunami

2010 ◽  
Author(s):  
Koichi Masuda ◽  
Mitsuhiro Masuda ◽  
Tomoki Ikoma
Keyword(s):  
Numerical Simulation ◽  
Floating Body ◽  
Present Calculation ◽  
Floating Bodies ◽  
Floating Structures ◽  
Mps Method ◽  
Calculation Results ◽  
Moving Particle ◽  
Collision Force ◽  
Water Front

The present paper describes the application of the moving particle semi-implicit method to a prediction of collision forces on water-front facilities induced by floating vessels washed onto the apron by tsunami. Effectiveness of the application is verified. Solitary waves are applied to simulated tsunamis in numerical simulation and to the model experiments. A pontoon type floating body is applied to floating structures in numerical simulations using the MPS method. The present calculation results are compared with the experimental results and the applicability of MPS method is discussed. Further, after being washed onto the wharf by tsunami, the characteristics of collision force on water-front facilities induced by the floating bodies are discussed.

A Fundamental Study on the Applicability of the Floating Large Size Tsunami Shelter

2016 ◽  
Author(s):  
Takuma Kishi ◽  
Kiyokazu Minami ◽  
Mitsuhiro Masuda
Keyword(s):  
Numerical Simulation ◽  
Implicit Method ◽  
Water Tank ◽  
Fundamental Study ◽  
Collision Model ◽  
Large Size ◽  
Tank Experiment ◽  
Water Tank Experiment ◽  
Moving Particle ◽  
Run Up

A floating large-size tsunami shelter (FLTS) has been proposed. The shelter can evacuate more than 1500 people to evacuate from run-up tsunami. The floating tsunami shelter can be lifted by buoyancy when tsunami hitting. In this study, First, Authors assumed Principal specifications of the FLTS from estimation of damage and second we evaluated the validity and safety of a floating large size tsunami shelter using the mooring dolphin by water tank experiment and numerical simulation that is moving particle semi-implicit method (MPS). As a result, enough performance was recognized. The mooring of dolphin was reduced the motion against 10m height tsunami than no moored. However it became clear about the numerical simulation that improvement was more necessary. In particular, the collision model was necessary improved by the existing model.

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