Computational Granular Simulation

About us

The purpose of the technical group of Computational Granular Simulation is to contribute to solving  problems of powder in various industries by making use of the latest computer simulation. The group will pay attention to academic approach aimed to simulate powder behaviors which remain unsolved due to some difficulties. In addition to that, the group will enlighten industry fields such as food, drug, cosmetics etc. which have few experiences of computer simulation and enable them to improve product development and production process based on the simulation technology.

 Current level of technology, trend and activities in future

In recent years, many studies of powder simulation have been reported aiming for understanding of powder phenomena and optimization of powder process. The method called discrete (distinct) element method (DEM) is used usually in the powder simulation. The DEM simulation has been developed rapidly during the past 20 years. Coupling with fluid, the coarse-grain model and direct simulation are typical examples of recent noteworthy development. In order to diffuse powder simulation and promote its application in wide-range industrial process, universities, soft-ware makers and soft-ware users should collaborate. Practical, yet innovative development and standardization should be done after clarifying the problems of current simulation. Considering this background situation, the group activities focus on the following subjects.

  1. Sophistication of powder simulationMany problem-solving is required to make the DEM simulation useful tools in a true sense for practical cases of powder industries. Problems to be solved are how to increase the number of small particles to be of the same order as in the actual equipment and how to treat complicated geometry and chemical reaction. This group tries to develop and establish new physical models to deal with these problems.
  2. Global standard of physical models
    In general, soft-ware makers are small companies and they tend to develop unique technologies in their own ways. In order to spread and diversify the technologies of each company, it is necessary to have a place where the information on physical models of each company can be shared among many companies concerned. The group will provide such a place and aim at standardizing physical models which have been developed by multiple makers and approved by many users. This standardization shall be made in a global scale and standardized models will be dispatched abroad.
  3. Systemization of verification method
    Currently, verification of simulated results is done by developers at their own discretion. This group will establish and systemize the unified method of verification with the aim of improving reliability of simulation.
  4. Systemization of input data
    There is no way in the current DEM simulation to determine the values of input data such as the cohesive force and the friction coefficient in the scientific manner. Therefore, such data are given on trial and error as fitting parameters to reproduce macroscopic phenomena. It is desirable to determine the input data based on data measured by an atomic force microscope (AFM) or other instruments of physical properties of particles.

Conductor

Coordinator Tokyo University. SAKAI/Mikio
Vice Coordinator Hiroshima University. ISHIGAMI/Toru
Representative Organizer KOZO KEIKAKU ENGINEERING Inc. SUMIYA/Tsuyoshi
Vice Representative Organizer NISSHIN ENGINEERING Inc. KOZAWA/Kazumi
Organizer ANTON PAAR JAPAN K.K. TAKATSUKA/Takayuki
CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY TANNO/Kenji
CYBERNET SYSTEMS CO., LTD. TOKUNAGA/Yuichi
DEM SOLUTIONS LTD. SUZUKIRI/Yoshihiro
IDEMITSU KOSAN CO., LTD. SAKAKURA/Kei
INSIGHT, INC. MIYOSHI/Akio
KURIMOTO, LTD. YAMASAKI/Kouji
PHOTRON LIMITED. KUWABARA/Jhoji
PLANTEC.INC SAMEJIMA/Ryoji
PROMETECH SOFTWARE, INC. YAMANOI/Mikio
RICOH COMPANY, LTD. WATANABE/Takahiro
STAY SHIFT Co., LTD. IMAICHI/Kenta
TAKENAKA CORPORATION INOUE/Ken
UNITIKA LTD. MIYAGAWA/Tetsuya