A minisymposium consists of one or more technical sessions that focus on a specific topic or research area in the scope of COMPSAFE. The technical sessions provide a flexible format that accommodates keynote lectures, invited, and contributed papers. Volunteer minisymposium organizers will develop each minisymposium individually. The organizers are responsible for the technical content of their minisymposium; they select the invited participants, and review abstracts of contributed papers.

MS-1: Computational Biomechanics in Health, Safety and Environmental Problems

Yohsuke Imai (Tohoku University, Japan, )
Takuji Ishikawa (Tohoku University, Japan)
Daisuke Tawara (Ryukoku University, Japan)
Sota Yamamoto (Shibaura Institute of Technology, Japan)
Duc Vinh Le (Institute of High Performance Computing, Singapore)

The aim of this mini-symposium is to discuss recent topics in computational biomechanics related to health, safety and environmental problems. An example is biomechanical modeling of cells, tissues, organs, or body to investigate diseases and injuries. Environmental problems such as algal blooms are also associated with the biomechanics of microorganisms. This class of problems involves fluid mechanics, solid mechanics, fluid-structure interaction, and also multi-physics, and hence the topics are expected to cover a wide range of biomechanics researches.

MS-2: High Performance Computing for Environmental Problems

Ryuji Shioya (Toyo University, Japan, )
Moon Ki Kim (Sungkyunkwan University, Korea)
Masao Ogino (Nagoya University, Japan)
A.M.M. Mukaddes (Shahjalal University of Science and Technology, Bangladesh)

High performance computing, parallel computing, system software, CAE software, large scale problems, and related topics for environmental problems are discussed in the mini-symposium.

MS-3: Advances in Structural Collapse Analysis

Daigoro Isobe (University of Tsukuba, Japan, )
Kimiro Meguro (University of Tokyo, Japan)
Jinkoo Kim (Sunkyunkwan University, Korea)

Collapse of structures occurred recently are mainly caused by extreme external loads such as aircraft collision, explosion, large seismic excitation, tsunami, typhoon, tornado, and big fire. Dynamic numerical codes are generally used to investigate such phenomena, however, the strong nonlinearity in the deformation of the structures often generates higher hurdle in the analyses. The main purpose of this mini-symposium is to bring together scientists and engineers who work in the fields mentioned above, and to discuss on the state-of-the-art numerical codes and the numerical analyses regarding collapse problems of civil and architectural structures.

MS-4: Quality and Reliability of Groundwater Flow Simulations

Makoto Nishigaki (Okayama University, Japan)
Peter-Wolfgang Graber (TU Dresden The Synergetic University, Germany)
Takuma Hasegawa (The Central Research Institute of Electric Power Industry, Japan)
Hideyuki Sakurai (Shimizu Corporation, Japan, )

Numerical analysis of groundwater flow by use of methods such as the finite element method, finite difference method, finite volume method and the boundary element method has been practiced for many years as a field of computer simulation, and various software packages for that purpose are available on the market. Numerical analysis, therefore, is an essential technique in the fields of groundwater environment conservation and radioactive waste disposal, which is currently an issue of global concern. What is to be analyzed by those techniques, however, is a complex three-dimensional region of infinite size consisting of a number of strata, and it is not possible to obtain precise information on its spatial distribution and physical properties. Although it is important to develop sophisticated simulation techniques based on intricate mathematical models, it is also very important to verify the validity of modeling itself and analytical results. The aim of this mini-symposium is to accept a broad range of research papers concerning groundwater flow simulation, focusing on the quality and reliability of simulation instead of looking only for academically unique studies, and discuss not only research and development technicalities such as modeling of problems, analysis techniques, analytical result evaluation methods and pre- and post-processing, but also more general topics such as what we should aim for in the coming years and handing down of technology.

MS-6: Computational Simulations in Nuclear Power Plants Subjected to Various Hazards

Shinobu Yoshimura (University of Tokyo, Japan, )
Seiichi Koshizuka (University of Tokyo, Japan)
Rong Tian (Chinese Academy of Sciences, China)

It is now highly demanded to quantitatively assess various types of risks in nuclear power plants subjected to internal as well as external hazards, and to properly design and implement preventive as well as mitigation measures. For such purposes, computer simulations are regarded as the most powerful and reliable methods. This mini-symposium aims to gather recent developments on such computational simulation technologies, finite elements, finite difference, finite volume, meshless and particle methods and their combinations. The phenomena to be addressed are solid, fluid, thermal, multi-physics and multi-scale phenomena.

MS-7: Simulation-based Disaster Prediction and Mitigation

Jiun-Shyan Chen (University of California, San Diego, USA, )
Dongdong Wang (Xiamen University, China)
Pai-Chen Guan (National Taiwan Ocean University, Taiwan)
Sheng-Wei Chi (University of Illinois at Chicago, USA)

In recent years, natural disasters have frequently happened worldwide due to earthquake, tsunami, land sliding, debris flow, and others. These disasters pose severe threat and damage to our living environment, and the disaster predication and mitigation have become a timely research topic for safeguarding our society. One effective approach for the disaster predication and mitigation is the computer simulations with robust numerical algorithms. This symposium aims to promote collaboration among academic researchers and industrial engineers in developing and applying advanced numerical methods for disaster predication and mitigation. Those who have been working on in the related fields are cordially invited to exchange their ideas and research results in this minisymposium. Presentations are solicited in all subjects related to numerical disaster simulation, which include but are not limited to the followings:

  • Advanced disaster simulation methods such as finite element methods, meshfree and particle methods, isogeometric analysis, discrete element methods, etc.
  • Constitutive modeling of disaster debris
  • Coupled solid and fluid mechanics approach
  • Fluid-structure interaction in disaster dynamics
  • Multiscale disaster simulation
  • Numerical algorithm implementation and simulation software development
  • Large scale and parallel computation
  • Other related subjects

MS-8: Numerical Simulations for Natural Disasters

Takayuki Aoki (Tokyo Institute of Technology, Japan, )
Taro Okamoto (Tokyo Institute of Technology, Japan)
Shuji Moriguchi (Tohoku University, Japan)
Worsak Kanok-Nukulchai (Asian Institute of Technology, Thailand)

Recent progress of supercomputers enables practical simulations for natural disasters such as seismic wave propagation of earthquake, tsunami, slope disasters, typhoon and so on. To improve the accuracy, we discuss key technologies, for example, numerical scheme, parallel computing, accelerator, multi-physics coupling from the view point of computation.

MS-9: Computationagl Reliability/Safety Assessment for Space Vehicles

Keiichiro Fujimoto (JAXA, Japan, )
Kenji Takizawa (Waseda University, Japan)
Tayfun E. Tezduyar (Rice University, USA)

To achieve challenging mission objectives of space vehicles within various limitations, establishment and effective use of computational reliability/safety assessment are essential. In this session, practical applications of computational reliability/safety assessment for space vehicles will be presented and further-research need for computational-engineering technology will be discussed.

MS-10: Hazard and Disaster Simulation of Earthquake and Tsunami

Muneo Hori (University of Tokyo, Japan)
Tsuyoshi Ichimura (University of Tokyo, Japan, )
Xinzheng LU (Tsinghua University, China)
Mitsuteru Asai (Kyushu University, Japan)
Shigenobu Okazawa (Hiroshima University, Japan)

Scope of this mini-symposium is to discuss developments and directions for large scale earthquake and tsunami simulation on super computers. Broadband aspects from earthquake engineering to seismology are expected with a special emphasis on use of super computers (e.g. structural response, soil amplification, city and social response, evacuation, recovery, fluid-structure coupling, global tsunami propagation, local tsunami run-up, earthquake ground motion, crust deformation, earthquake cycle and the other related issues in earthquake and tsunami)

MS-11: Numerical Methods and Models for Multi-Phase Flows with Free/Moving Interfaces and Applications

Feng Xiao (Tokyo Institute of Technology, Japan, )
Kazuo Kashiyama (Chuo University, Japan)
Satoru Ushijima (Kyoto University, Japan)
Naoki Takada (AIST, Japan)
Akio Ikebata (TOTO, Japan)
Keh-Ming Shyue (National Taiwan University, Taiwan)

Multi-phase flows with free or moving interfaces, scaling from micro droplets and bubbles to tidal waves and tsunamis, exist widely in natural environments and industrial processes. The interfaces that separate different fluids and evolve as part of the solution of the whole flow field usually experience extremely complex and violent changes in both time and space, which makes it a great challenge to computational mechanics. In spite of the tremendous efforts devoted so far, there are still many unsolved problems and difficulties in numerical modeling of multiphase interfacial flows.

This mini-symposium provides an informative and stimulating forum to enhance the academic communications on this challenging topic. The scope of this symposium includes, but not limited to

  1. Fundamental researches on the numerical schemes for capturing or tracking moving interfaces, like volume of fluid, level set, phase field, front tracking methods, as well as the particle-based methods;
  2. Developments of numerical models for interfacial multi-phase flows which involve not only the fluid solvers but also the relevant physical models;
  3. Implementations and applications to real-case problems in environments, natural disaster preventions and industrial/manufacturing processes.

This symposium is configured to be interesting to a broad range of presenters and audiences in the related fields, including scheme researchers, model developers and users.

MS-12: Fracture Mechanics Analyses on Small to Large Scale Important Infrastructures

Toru Ikeda (Kagoshima University, Japan, )
Shengping Shen (Xi'an Jiaotong University, China)
Zhuang Zhuo (Tsinghua University, China)
Hiroshi Okada (Tokyo University of Science, Japan)
Toshio Nagashima (Sophia University, Japan)

The scale lengths of important infrastructures and their components that support our modern civilized society span from the order of nm to km. For example, they are electronic packages to bridges and ships. To assure their safe and sustainable operations, the fracture mechanics analyses have often been applied to such infrastructures and their components. In this minisymposium, we will discuss about the latest developments on computational fracture mechanics applications and methodologies to the small to large scale infrastructures.

MS-13: Reliable Modeling of Turbulent Flows

Ryo Onishi (Japan Agency for Marine-Earth Science and Technology, Japan, )
Yosuke Hasegawa (The University of Tokyo, Japan)
J.C.Vassilicos (Imperial College London, UK)
Keiko Takahashi (Japan Agency for Marine-Earth Science and Technology, Japan)

The advance of high-performance computing enables us to perform ever higher-resolution flow simulations, for weather and climate prediction as well as for engineering applications. In these high-resolution simulations, more reliable turbulence modeling is often required. However, there are still many turbulence-related processes that are poorly estimated in numerical simulations; e.g., turbulent mass and heat transfer, turbulent particle collisions, turbulent mixing, turbulent entrainment and so on. Reliable modeling of these processes will lead to more reliable simulations of flow-related disasters such as heavy storms, tsunami and contaminant dispersions. This minisymposium aims to contribute to public safety by promoting discussion in this important research field.

MS-14: Damage, Material Instabilities and Fracture

Shigenobu Okazawa (Hiroshima University, Japan, )
René de Borst (University of Glasgow, UK)

Recent decades have seen major advances in the understanding and the modeling of damage and fracture. For instance, it is now well recognized that local approaches to damage fail at a generic stage of the loading process due to the fact that they lead to an ill-posed boundary value problem. Numerically, this manifests itself in an excessive mesh dependency. A host of non-local and rate-dependent damage models have been developed to remedy this issue. Closely related is the issue of material instability, which can lead to structural instability, and to multiple solutions and often densely clustered bifurcation points. Finally, discrete approaches to fracture can be applied more flexibly with the advent of mesh-free methods, partition-of-unity (xfem) approaches, and isogeometric analysis, or in a regularized manner, via phase-field models.

This symposium welcomes contributions on the latest research into numerical approaches to damage, material instabilities and fracture in materials (metals, concrete, soils, rocks, polymers, composites, wood, biomaterials). The scope encompasses brittle, quasi-brittle and ductile fracture, and fundamental as well as practical aspects for the evaluation of safety.

MS-15: Computational Fluid Dynamics for Wind Environment and Disasters

Akashi Mochida (Tohoku University, Japan)
Takashi Nomura (Nihon University, Japan, )
Qinglin Meng (South China University of Technology, China)
Taeyeon Kim (Yonsei University, Korea)

Novel issues and experiences in CFD technologies and applications on the problems of urban wind climates, wind-induced disasters including snowdrift, and wind energy are exchanged.

MS-16: Computational Technologies in Diagnosis and Prognosis of Infrastructure

Kazuyuki Nakahata (Ehime University, Japan, )
Tae-Hyung Lee (Konkuk University, Korea)
Takahiro Saitoh (Gunma University, Japan)
Mitsuteru Asai (Kyushu University, Japan)
Sohichi Hirose (Tokyo Institute of Technology, Japan)

The long-term deterioration of infrastructures becomes serious problems all over the world. Unless any measures to cope with the situation, severe damages for human body, economic activities, and among others might be suffered. To protect the sudden collapse and continue to use the infrastructure under the guarantee of safety, we need to understand the properties of the structural components correctly using appropriate diagnosis techniques. Furthermore, proper prognosis techniques after the repair are required for the residual life prediction. In this mini-symposium, numerical approaches for material evaluation, diagnosis and prognosis techniques, and maintenance mechanics are discussed by scientists and engineers. The following topics will be welcomed, and the other related topics are also acceptable:

  • Modeling and simulation of infrastructures
  • Computational mechanics of structural components
  • Control of maintenance
  • Nondestructive evaluation
  • Concrete related themes
  • Reliability and safety
  • Rehabilitation of infrastructures
  • Mutiscale and multiphysics approaches

MS-17: Recent Advancement of Computational Engineering and Science for Soil-Fluid-Structure Interaction Problems

Kenichi Maeda (Nagoya Institute of Technology, Japan, )
Yoshihisa Miyata (National Defense Academy, Japan)
Ryosuke Uzuoka (Univ. of Tokushima, Japan)
Dr. Andy W. Take (Queen's Univ., Canada)
Andrea Diambra (Univ. of Bristol, UK)

Heavy rain, typhoons, earthquakes, and tsunamis cause various disasters. The natural hazard mitigation is an important problem in our human life. Summarizing the recent disasters, it can be pointed out that soil-fluid-structure interaction problem is key issue. Debris flow disaster, scour and erosion in the flood, collapse of structure by tsunami are one of the examples. These problems have been discussed in each special area such as geotechnical, coastal, and structural engineering. However effective method has not developed enough. To make advanced mitigation plan for these problems, exhaustive research which is free from classical technical category is required.

From the above view, this mini-symposium will discuss the recent advancement of computational engineering and science for soil-fluid-structure interaction problems. Survey/ monitoring with the information and communication technology, design with advanced computer simulation technique, and risk evaluation with statistical/ reliability theory will be summarized by keynote lecture and organizers and discussed. Submitted papers to this mini-symposium will be also presented and discussed.

Note: Total number of presentation is expected to be 12. The keynote lecturer will be done by Dr. Andy W. Take who is an organizer.

MS-18: Discrete Modeling Approach for Geo-Hazard Prediction

Takashi Matsushima (University of Tsukuba, Japan, )
Yukio Nakata (Yamaguchi University, Japan)
Jean-Noël Roux (Université Paris-Est, France)
Shuji Moriguchi (Tohoku University, Japan)

This mini-symposium aims to discuss various aspects of discrete modeling approach for geo-hazard prediction. It includes grain-scale behavior of geomaterials, innovation of particle or discrete based numerical tools and their application into various geo-related hazards such as slope failure, debris flow, rock and snow avalanches, liquefaction, tsunami, etc. A strong emphasis is put on the prediction of catastrophic failure and large deformation of geomaterials triggered by major earthquake. Multi-scale multi-physics simulations related to short-term geo-hazards and long-term natural hazards (environmental issues) are also within the scope of the symposium.

MS-19: Computational Aviation Safety and Climate

Shigeru Obayashi (Tohoku University, Japan, )
Keisuke Asai (Tohoku University, Japan)
Naoki Matayoshi (JAXA, Japan)
Volker Grewe (DLR, Germany)

Further improvements in aviation safety are an important issue to ensure the prediction of air traffic growth in the next 30 years. Such growth will then have a significant impact on the climate and the resulting climate change will present a hazard to aviation. With the aid of supercomputers, Computational Fluid Dynamics is now posed to attack these problems. This minisymposium will bring together scientists and engineers to form a new community for aviation safety from the various related fields.

MS-20: Multiscale Modeling for Computational Durability and Safety Engineering

Kenjiro Terada (Tohoku University, Japan, )
Tong-Seok Han (Yonsei University, Korea)
Olivier Allix (Université Paris 6, France)

This minisymposim focuses on the developments and applications of computational methods for multiscale modeling and analyses with a view to safety assessment of materials and structures, including all pending challenges. In this context, a class of computational homogenization methods must be one of the promising strategies for determining the effective behavior of complex and highly heterogeneous materials, and for computing the response of structures composed of these materials. Although some of the methods are of great utility value even in practical applications and seems to be mature in the field of computational mechanics, there must be some room for further development in view of durability assessment.

The topics covered include (but not limited to) :

  • Heterogeneous, time-dependent and nonlinear material behaviour, including material dynamics;
  • Heterogeneous materials with coupled multi-physics behavior (phase change, chemo-mechanics, nonlinear thermo-mechanics...), including extended homogenization schemes;
  • Materials with a complex physical geometry, e.g. provided by high resolution 3D imaging techniques;
  • Multiscale damage modeling, capturing the transition from homogenization to localization;
  • Computational homogenization including size and second-order effects;
  • Microstructures with complex interfaces;
  • Multiscale simulations with non-local phenomena like cracks, instabilities or shear bands;
  • Reduction of computational costs associated with multiscale algorithms;
  • Integration of phenomena occurring at nanoscale.

MS-21: Computational Methods for Water Environmental Problems and Coastal/Flood Disaster Mitigation

Kazuo Kashiyama (Chuo University, Japan, )
Clint Dowson (The University of Texas at Austin, USA)
Shunichi Koshimura (Tohoku University, Japan)
Ethan Kubatko (The Ohio State University, USA)

A number of natural disasters such as floods, storm surges, tsunamis occur annually in various parts of the world. Also, the transport problems such as water pollution and the sediment transport are becoming important issues in water environmental problems. This mini-symposium will examine the latest developments in solving uncoupled and coupled flow, transport problems with water environmental applications and the coastal/flood disaster mitigation.

MS-22: Recent Advances in Computational Geomechanics

Akira Murakami (Kyoto University, Japan, )
Feng Zhang (Nagoya Institute of Technology, Japan)
Giovanna Biscontin (University of Cambridge, UK)

This minisymposium will focus on the current state of development of the computational methods in geomechanics and warmly welcomed are papers showing application of such methods to practical engineering problems. Papers are able to address the improvements that can be obtained on clarifying aspects related to geomaterial behavior and physical modeling are invited.

MS-23: Crash Safety and Active Safety in Automobile

Ichiro Hagiwara (Meiji University, Japan, )
Satoshi Kitazaki (Iowa State University, USA)
Sunao Tokura (Tokura Simulation Research, Japan)
Wang Lirong (Shenzhen Institutes of Advanced Technology, China)

Besides collision simulation for traffic accident, we deal with the subject of active safety as prevention safety. As an extension, it’ll lead to automatic driving.We’ll pick up a wide range of scope concerning automobile safety as mentioned above.