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Mitsuteru Asai Last modified date：2021.10.21

Associate Professor / Structural and Earthquake Engineering
Faculty of Engineering


Graduate School
Department of Civil and Structural Engineering
Graduate School of Engineering
Undergraduate School
Department of Earth Resources,Marine and Civil Engineering
School of Engineering


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Homepage
https://kyushu-u.pure.elsevier.com/en/persons/mitsuteru-asai
　Reseacher Profiling Tool　Kyushu University Pure
http://www.doc.kyushu-u.ac.jp/kouriki/
Phone
092-802-3373
Academic Degree
Ph.D
Field of Specialization
Computational Mechanics, Structural Mechanics
Outline Activities
1. Development of fluid-structure simulator in order to protecting coastal area
2. Multiscale damage simulation for heterogeneous brittle materials
3. Fast dynamic structure analysis tool using model order reduction method
Research
Research Interests
  • Development of a new numerical simulator for Tsunami disaster and its prevention
    keyword : Tsunami, Fluid-Struture Interaction simulation, Particle method
    2009.05～2016.05.
  • Coupling simulation between chemical reaction and mechanics for prediction of the aging degradation in concrete
    keyword : Coupling simulation, ASR
    2009.05～2016.05.
  • Development of a hybrid simulator for structure analysis with water induced impact force
    keyword : hybrid simulator, water induced impact force
    2008.10～2013.03.
  • Large deformation analysis for texture reinforced rubber
    keyword : anisotropic hyperelastic model, viscosity
    2007.09～2009.09.
  • Static and dynamic strength eveluation of storne arch bridges by using a discreate finite element model
    keyword : storne arch bridge, discreate finite element model
    2007.09～2009.09.
Academic Activities
Books
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1. Marek Solecki, Abdelraheem M. Aly, Mitsuteru Asai , Mass Transfer -advencement in process modelling-, InTech, Chapter 4 Double-diffusive natural convection with cross-diffusion effect in an anisotropic porous enclosure using ISPH method, 2015.10.
Reports
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Papers
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1. Daniel S. Morikawa, Mitsuteru Asai, Coupling total Lagrangian SPH-EISPH for fluid-structure interaction with large deformed hyperelastic solid bodies, Computer Method in Applied Mechanics and Engineering, https://doi.org/10.1016/j.cma.2021.113832, 2021.08, 粒子法による流体構造連成解析をする際，特に構造解析の大変形解析が不安定になり，ロバストに解析が実施することが困難であった。そこで、超弾性体モデルの範囲内であれば、初期配置と現配置の間に1対1の関係があることを利用し、固体のつり合い問題を初期配置で解くTotalラグランジュ記述によるSPH粒子法を利用した新しい流体構造連成解析法を提案した。.
2. Mitsuteru Asai，Li Yi, Bodhinanda Chandra, Masaharu Isshiki, Fluid-rigid body interaction simulations and validations using a coupled stabilized ISPH-DEM incorporated with the energy tracking impulse method for multiple body contacts, Computer Method in Applied Mechanics and Engineering, https://doi.org/10.1016/j.cma.2021.113681, 2021.04, 流体構造連成解析手法はいくつか提案されているものの、複数固体間での接触摩擦を含む問題を安定して解く方法はいまだ確立していない。そこで、流体、剛体の両者を粒子で離散化した上で、安定した流体剛体連成解析を実施とした。著者らが前報で提案した撃力で接触を表現するEnergy-tracking impulse法をベースとし、ISPH法による流体解析との連成させた新手法を提案した。.
3. Daniel Shigueo Morikawa, Harini Senadheera, Mitsuteru Asai, Explicit Incompressible Smoothed Particle Hydrodynamics in a multi-GPU environment for large scale simulations, Journal of Computational Particle Mechanics, 2020.06, GPUの性能向上により、コードによってはCPUと比較してかなり高速な演算が可能となっている．研究対象とした非圧縮性流体の粒子法では、演算時間よりも使用メモリの制限のため、大規模な計算をGPU上で実施することは困難であった．そこで、計算アルゴリズムを見直し、陽解法化（連立一次方程式を厳密に解かず、近似解で与える）することで、使用メモリを大幅に減らし、1GPUで2000万～3000万粒子を使った演算が可能とした．さらに大規模な演算を実施するため、1ノードに搭載できる複数のGPUを使用することで、1億粒子以上の計算を可能とし、またGPUを使った従来研究と比べても高速な演算が実施できてることを示した．.
4. Li Yi, Mitsuteru Asai, Bodhinanda Chandra, Masaharu Isshiki, Energy-tracking impulse method for particle-discretized rigid-body simulations with frictional contact, Journal of Computational Particle Mechanics, https://doi.org/10.1007/s40571-020-00326-5, 2020.04, 剛体接触解析を行う常套手段としては、バネとダッシュポットで簡易的に表現するペナルティ法が良く採用されるが、時間増分が小さくなる、また人工パラメータの設定方法が曖昧であるなどの、問題点があった。そこで、適切な力（撃力：インパルス）で接触を表現するインパルス法に着目し、特にエネルギー保存性を担保できるEnergy-tracking impulse法をベースとし、これをDEMなどの粒子離散化された剛体の解析へと適用した。.
5. Daniel Morikawa, Mitsuteru ASAI, Nur' Ain Idris, Yusuke Imoto, Masaharu Isshiki, Improvement in highly viscous fluid simulation using a fully implicit SPH method, Journal of Computational Particle Mechanics, 10.1007/s40571-019-00231-6, 2019.03, 土石流あるいは火砕流などの災害シミュレーションへ向けた高粘性流体のシミュレーションのために、独自に開発してきた粒子法（ISPH法）を改良し、
安定かつ高精度に解析可能な手法を開発した。.
6. Masao OGINO, Takyuya IWAMA, Mitsuteru ASAI, Development of an ISPH-FEM Weak Coupling Analysis System for 3-dimensional Fluid-Structure Interaction Problems, Teroretical and Applied Mechanics Japan, 2018, 2018.08.
7. Masao OGINO, Takyuya IWAMA, Mitsuteru ASAI, Development of a partitioned coupling analyssis system for fluid-structure interactions using an in-house ISPH code and the ADVENTURE system, International Journal of Computational Methods, 2018, 2018.03.
8. Li Yi, Mitsuteru ASAI, Fluid-rigid body interaction simulation based on a stabilized ISPH method incorporated with the impulse-based rigid body dynamics, 日本計算工学論文集, https://doi.org/10.11421/jsces.2018.20182010, 2018, 2, p.20182010, 2018.02.
9. Abdelraheem M. Aly, Mitsuteru Asai, Water Entry of Decelerationg Spheres Simulaitons using Improved ISPH method, Journal of Hydrodynamivs, 2017.03.
10. Abdelraheem M. Aly, Mitsuteru Asai, ISPH method for double-diffusive natural convection under cross difussion effects in an anisotropic porous cavity/annulus, International Journal of Numerical Methods for Heat & Fluid Flow, 26, 1, 235-268, 2016.10.
11. Masaharu Isshiki, Mitsuteru Asai, Shimon Eguchi, Hideyuki O-tani, 3D tsunami run-up simulation and visualization using particle method with GIS-based geography model, Journal of Earthquake & Tsunami, 2016.06.
12. Mitsuteru Asai, Yoshiya Miyagawa, Nur'Ain Idris, Abdul Muhari, Fumihiko Imamura, Coupled tsunami simulation based on a 2D shallow-water equation-based finite difference method and 3D incompressible smoothed particle hydrodynamics, Journal of Earthquake & Tsunami, 2016.06.
13. Abdelraheem M. Aly, Mitsuteru Asai, A. Chamkha, Analysis of Unsteady Mixed Convection in Lid-Driven Cavity Included Circular Cylinders Motion Using an Incompressible Smoothed Particle Hydrodynamics Method, International Journal of Numerical Mechods for Heat and Fluid Flow, 25, 2014.12.
14. Abdelraheem M. Aly, Mitsuteru Asai, YOSHIMI SONODA, Modelling of surface tension force for free surface flows in ISPH method, International Journal of Numerical Methods for Heat and Fluid Flow, 23, 3, 479-498, 2013.04.
15. Mitsuteru ASAI, Abdelraheem M. ALY, Yoshimi SONODA, Yuzuru SAKAI , A stabilized incompressible SPH method by relaxing the density invariant condition, Journal of Applied Mathematics, Volume 2012 (2012), Article ID 139583, 24 pages, 2012.04.
16. Abdelraheem M. Aly, Mitsuteru Asai, Yoshimi Sonoda, Simulation of free falling rigid body into water by a stabilized incompressible SPH method, Ocean Systems Engineering, Vol. 1, No. 3, 2011.08.
17. Mitsuteru Asai，Norliyati M. Amin, Yoshimi Sonoda, Practical determination of an effective reduced order in a model order reduction of dynamic FEM via Krylov subspace, 応用力学論文集, Vol.14, 2011.08.
18. Mitsuteru Asai, Abdelraheem M. Aly, Yoshimi Sonoda, ISPH-FEM coupling simulator for the FSI problems, Proceeding of the 6th SPHERIC SPH workshop, pp.201-208, 2011.06.
19. Norliyati Mohd Amin, Mitsuteru Asai, Yoshimi Sonoda, Application of a model order reduction based on the Kryrov subspace to finite element transient analysis imposing several kinds of boundary condition, IOP conf. ser. : Material Science and Engineering,, 10, 012118, 2010.05.
20. Mitsuteru Asai, Naoki Takano, Yasutomo Uetsuji, Kunihiko Taki, An iterative solver applied to strongly coupled piezoelectric problems of porous Pb(Zr.Ti)O3 with nondestructive modeling of microstructure, Modeling and Simulation in Metarial Science and Engineering, Vol. 15, pp. 597-617, 2007.07.
21. Kenjiro Terada, Mitsuteru Asai, Michihiro Yamagishi, Finite cover method for linear and nonlinear analysis of heterogeneous solids, International Journal of Numerical Methods in Engineering, Vol.58, pp.1321-1346, 2003.11.
22. Mitsuteru Asai, Kenjiro Terada, Kiyohiro Ikeda, Hiroyuki Suyama, Katashi Fujii, Meso-scopic numerical analysis of concrete structures by a modified lattice model, 土木学会論文集I, Vol.20, No.1, pp.43-54, 2003.04.
Presentations
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1. Mitsuteru Asai, Daniel S. Morikawa, Non-Newtonian fluid simulation using a particle method for landslide simulations, 14th World Congress in Computational Mechanics and ECCOMAS, 2021.01.
2. Mitsuteru Asai, Yi Li, Simulations of free-surface flow interacting with multiple rigid bodies using coupled ISPH-DEM incorporated with an energy-tracking impulse method
, 14th World Congress in Computational Mechanics and ECCOMAS, 2021.01.
3. Shota Deguchi, Mitsuteru Asai, Hiroto Ueki, Yuki Takeuchi, Koji Kawasaki, Probabilistic disaster risk evaluation with surrogate-modelled numerical simulations, COMPSAFE 2020, 2020.12.
4. Hidetaka Ishii, Mitsuteru Asai, Daigoro Isobe, Hideyuki O-tani, Seismic response analysis for the whole city with the ASI-Gauss code to estimate a city level damage, COMPSAFE 2020, 2020.12.
5. Kumpei Tsuji, Mitsuteru Asai, Comparison of Spherical and Non-Spherical DEM in Reproducing Arch-Effect Characteristic of Ground Collapse Phenomenon, COMPSAFE 2020, 2020.12.
6. Takehiro Fujii, Mitsuteru Asai, Yusuke Imoto, Fluid-solid multiphase analysis using a selective dual velocity ISPH method dividing into physical and transport velocity, COMPSAFE 2020, 2020.12.
7. Kunpei Tsuji, Mitsuteru Asai, Fluid-Solid Multiphase Disaster Simulator using SPH-DEM coupled Method, 7th Asian Pacific Congress on Computational Mechanics, 2019.12.
8. Hiroto Ueki, Mitsuteru Asai, Koji Kawasaki, Shigetoshi Kawasaki, Drainage simulation using highly detailed unstructured grid for urban flood damage prediction, 7th Asian Pacific Congress on Computational Mechanics, 2019.12.
9. Kohei Hara, Mitsuteru Asai, Daigoro Isobe, Seizo Tanaka, Wooden houses collapse simulation during earthquake and tsunami at a city level base on the ASI-Gauss
finite element method, 7th Asian Pacific Congress on Computational Mechanics, 2019.12.
10. Takehiro Fujii, Mitsuteru Asai, A validation for soil scouring analysis based on a SPH-DEM coupled method, 7th Asian Pacific Congress on Computational Mechanics, 2019.12.
11. Taiga Makino, Mituteru Asai , Multi scale tsunami simulation from earthquake initiation tsunami run-up into the coastal area, 7th Asian Pacific Congress on Computational Mechanics, 2019.12.
12. Mitsuteru Asai, Mikito Furuichi, Daisuke Nishiura, Dynamic Load Balanced Expanding Slice Grid Method for Large-scaled High Fidelity Tsunami Run-up Simulation suing an Explicit SPH, VI International Conference on Particle-based Method - Fundamentals and Applications PARTICLES 2019, 2019.10.
13. Li Yi, Mitsuteru Asai, Bodhinanda Chandra, Simulation of Free-surface Flow Interacting with Multiple Rigid Bodies using Coupled ISPH－DEM incorporated with Energy Tracking Impulse Contact, VI International Conference on Particle-based Method - Fundamentals and Applications PARTICLES 2019, 2019.10.
14. Kunpei Tsuji, Mitsuteru Asai, Fluid-Solid multi-phase flow simulator using a SPH-DEM coupling method in consideration of liquid bridge force related to water content, VI International Conference on Particle-based Method - Fundamentals and Applications PARTICLES 2019, 2019.10.
15. Daniel Morikawa, Mitsuteru Asai, Masaharu Isshiki, Verification and Validation in Highly Viscous Fluid Simulation using a Fully Implicit SPH Method, VI International Conference on Particle-based Method - Fundamentals and Applications PARTICLES 2019, 2019.10.
16. Kohei Hara, Mitsuteru Asai, Daigoro Isobe, Seizo Tanaka, Collapse Simulation of Aso Bridge During The 2016 Kumamoto Earthquakes By
Asi-Gauss Code, 7th International Colloquium on Performace, Protections & Strengthening of Structure Under Extreme Loading & Events, 2019.10.
17. Mitsuteru Asai, Li Yi, Fluid-rigid body interaction simulation based on a stabilized ISPH incorporated with an Energy Tracking Impulse method

, 20th Internatinal Conference on Fluild Flow Problem, 2019.04.
18. Daniel Shigueo Morikawa, Mitsuteru Asai, Improvements on Highly Viscous Fluid Simulation Using the SPH Method, 7th International Conference on Protection of Structures against Hazards, 2018.10.
19. Kohei Hara, Mitsuteru Asai, Daigoro Isobe, Verification on collapse process of Aso bridge during the 2016 Kumamoto earthquakes by ASI-Gauss method, 7th International Conference on Protection of Structures against Hazards, 2018.10.
20. Kumpei Tsuji, Mitsuteru Asai, Yasuhiko Konishi, Shuichi Oomine, 3-Dimensinal SPH-DEM coupled simulation for elucidating road caving collapse processes involving water-soil coupling phenomenon, 7th International Conference on Protection of Structures against Hazards, 2018.10.
21. Naoki Nakaya, Mitsuteru Asai, Ryoichiro Agata, Takane Hori, Toshitaka Baba, Tsunami Run-up Simulation Based on Crustal Deformation Simulation by FEM, 7th International Conference on Protection of Structures against Hazards, 2018.10.
22. Mitsuteru Asai, Naoki Nakaya, Ryoichiro Agata, Takane Hori, Toshitaka Baba, A physical simulation based earthquake scenario and a multi-scale Tsunami simulation, 13th World Congress on Computational Mechanics, 2018.07.
23. Li Yi, Mitsuteru Asai, Fluid-rigid body interaction simulation based on ISPH incorporated with impulse-based method, 13th World Congress on Computational Mechanics, 2018.07.
24. Daniel Shigueo Morikawa, Mitsuteru Asai, Improvements on Highly Viscous Fluid Simulation using a Particle Method and Its Application to Landslide Problems, 13th World Congress on Computational Mechanics, 2018.07.
25. Mitsuteru Asai, Natural disaster simulation by as multiphysics particle simulation, 4th Computational Desing in Engineering, 2018.04, 独自に開発を進めている粒子法によるマルチフィジックス解析ツールによる災害被害予測シミュレーションに関する招待講演（セミプレナリー）を実施した。.
26. Daniel Shigueo Morikawa, Mitsuteru Asai, Improvements on Highly Viscous Fluid Simulation using a Particle Method, 4th Computational Desing in Engineering, 2018.04.
27. Li Yi, Mitsuteru ASAI, A bridge wash-out simulation using a stabilized ISPH incorporated with multi-body dynamivs based on the impulse-based contact force method, Compsafe 2017, 2017.10.
28. Masao Ogino, Mitsuteru ASAI, Takuya Iwama, A study on parallel fluid-structure interaction simulations using a SPH code and the adventure through REVOCAP_coupler, Compsafe 2017, 2017.10.
29. Masao Ogino, Mitsuteru Asai, Takuya Iwama, A study on parallel fluid-structure interaction simulations using a SPH code and the adventure through REVOCAP coupler, Compsafe 2017, 2017.10.
30. Yi Li, Mitsuteru Asai, A bridge wash-out simulation using a stabilized ISPH incorporated with multi-body dynamivs based on the impulse-based contact force method, Compsafe 2017, 2017.10.
31. Mitsuteru Asai, Multi-scale and –physics tsunami disaster simulation for disaster prevention and mitigation, Compsafe 2017, 2017.10.
32. Kensuke Harasaki, Mitsuteru ASAI, Development of a fluid-solid multiphase flow simulation by a SPH-DEM coupled method for simulating a seawall destruction due to soil foundation scour, Particle 2017, 2017.09.
33. Mitsuteru ASAI, Multi-scale and –physics tsunami disaster simulation for disaster prevention and mitigation, Particle 2017, 2017.09.
34. Keita Ogasawara, Mitsuteru Asai, Mikito Furuichi, Daisuke Nishiura, Peformance of large scaled tsunami run-up analysis using Explicit ISPH method, Particle 2017, 2017.09.
35. 浅井 光輝, Multi-scale and –physics tsunami disaster simulation for disaster prevention and mitigation, Compsafe 2017, 2017.02.
36. Mitsuteru Asai, Masaharu Isshiki, Syoichi Tanabe, Large scale tsunami simulation by the incompressible SPH with real geography generated from aero-survery data, International Conference on Particle-Based Method (Particle2013), 2013.09.
37. 浅井 光輝, Large scale tsunami simulation by a particle method and its application to disaster prediction, 12th U.S. Natinal Congress on Computational Mechanics (USNCCM12), 2013.07.


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