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Dive into the research topics where Jun Imasato is active.

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Featured researches published by Jun Imasato.


ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference | 2006

Free Surface Flow Analysis by Smoothed Particle Hydrodynamics

Jun Imasato; Yuzuru Sakai

In this study a new computational algorithm to enforce incompressibility in free surface flow analysis using Smoothed Particle Hydrodynamics (SPH) is presented. The method uses two steps. The first step is a fractional step for solving velocity field forward in time without incompressibility. Then the second step is computed to compensate the pressure Poisson equation using the mass constant equation in a particle field. This method is composed of the above two steps and is similar to SMAC (Simplified Marker and Cell) method commonly used in CFD. However in SPH simulation, the introduction of incompressibility of fluid is easily realized using the particle density concept and the boundary of free surface of fluid is also controlled conveniently by the concept. In this study the algorithm is applied to sloshing problems of vessels with fluid. The numerical results using this algorithm show good results in the behaviors of free surface flow and the pressure evaluations at the wall of the vessels.Copyright


Transactions of the Japan Society of Mechanical Engineers. A | 1998

Free Mesh Method by Using Object-Oriented Approach.

Jun Imasato; Yuzuru Sakai

Free Mesh Method, which is a kind of meshless method, is simple, accurate and suitable for parallel computing. In this method, the total stiffness matrix is obtained by adding the temporary element matrices, so this method does not require connectivity between nodes and elements as an input infomation. This paper describes anapplication of Free Mesh Method in 2 dimension at the stage of creating a set of temporary triangular elements around each nodes. For implementation, this system is desgined by an Object-Oriented approach in order to provide a efficient program for every algorithm and data structure, from geometical point of view.


The Proceedings of The Computational Mechanics Conference | 2005

916 Large Scale Flow Analysis by SMAC-SPH Method using PC Clusters

Yuzuru Sakai; Jun Imasato; Shunta Kawasaki; Nobuki Yamagata


The Proceedings of The Computational Mechanics Conference | 2012

401 A Study of Tsunami Simulation using Particle Method

Jun Imasato; Yuzuru Sakai


The Proceedings of The Computational Mechanics Conference | 2010

2207 A Study of a Large-scale Fluid Analysis by Particle Method in Coast Region

Jun Imasato; Yuzuru Sakai


The Proceedings of The Computational Mechanics Conference | 2009

1809 A study of a large-scale analysis using particle method

Jun Imasato; Yuzuru Sakai


Archive | 2008

A Large-scale Three dimensional Fluid Analysis by SPH method

Jun Imasato; Yuzuru Sakai


The proceedings of the JSME annual meeting | 2007

1211 Application of Large-scale Fluid Analysis using SMAC-SPH Method

Jun Imasato; Yuzuru Sakai


The Proceedings of The Computational Mechanics Conference | 2006

152 Study of computational efficiently on distributed memory parallel computer using SPH

Jun Imasato; Yuzuru Sakai


The Proceedings of The Computational Mechanics Conference | 2004

Study of improvement of computaional speed for particle methods

Jun Imasato; Yuzuru Sakai

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Yuzuru Sakai

Yokohama National University

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