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RIKEN Center for Computational Science Complex Phenomena Unified Simulation Research Team

Team Leader: Makoto Tsubokura (Ph.D.)

Research Summary

Makoto  Tsubokura(Ph.D.)

When we look into complex flow phenomena observed in natural environment or manufacturing processes, they are sometimes relating to and coupled with structure deformation, heat transfer, electromagnetic field or chemical reaction. While each simulation method has been optimized to such a specific phenomenon, increasing attention is now paid to such complex phenomena governed by multiple governing equations. The problem of coupled simulation by combining existing different simulation methods is it is very difficult to utilize efficiently rapidly-growing computational environment. The objective of our team is to develop a unified simulation method for the complex phenomena with multiple time and space scales simultaneously by effectively utilizing massively parallel resources. We also provide tools or algorithm relating to the unified simulation to support supercomputer uses for their programming and usage environment.

Main Research Fields

  • Engineering

Related Research Fields

  • Environmental Science
  • Interdisciplinary Science & Engineering
  • Mathematical & Physical Sciences


  • Fluid Dynamics
  • Turbulence
  • Computational Fluid Dynamics
  • Vehicle Aerodynamics
  • Large Eddy Simulation

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

  • 1.Jansson, N., Bale, R., Onishi, K., Tsubokura, M.,
    "Dynamic Load Balancing for Large-Scale Multiphysics Simulations",
    High-Performance Scientific Computing : Jülich Aachen Research Alliance (JARA) High-Performance Computing Symposium, pp. 13–23, (2016)..
  • 2.Wu-Shung Fu, Wei-Hsiang Wang, Chung-Gang Li & Makoto Tsubokura,
    "An investigation of the unstable phenomena of natural convection in parallel square plates by multi-GPU implementation",
    An International Journal of Computation and Methodology, Volume 71(1), pp.66-83, (2016).
  • 3.Li Chung-Gang, Tsubokura Makoto, Bale Rahul,
    "Framework for simulating natural convection in practical applications",
    International Communications in Heat and Mass Transfer, Volume 75, pp.52-58, (2016).
  • 4.* Jing Li, Makoto Tsubokura, Masaya Tsunoda,
    "Numerical Investigation of the Flow Around a Golf Ball at Around the Critical Reynolds Number and its Comparison with a Smooth Sphere",
    Flow, Turbulence and Combustion, Volume 95, Issue 2–3, pp.415–436, (2015)
  • 5.Chun-Gang Li, Makoto Tsbuokura, Keiji Onishi:
    "Feasibility Investigation of Compressible Direct Numerical Simulation with Preconditioning Method at Extremely Low Mach Numbers"
    International Journal of Computational Fluid Dynamics, vol.28, Issue 6-10, pp.411-419, (2014)
  • 6.Keiji Onishi, Makoto Tsubokura:
    "Vehicle Aerodynamics Simulation for the Next Generation on the K computer: Part 2 Use of Dirty CAD Data with Modified Cartesian Grid Approach"
    SAE International Journal of Passenger Cars – Mechanical Systems, 7(2): 2014-01-0580(2014)
  • 7.Makoto Tsubokura, Andrew Hamilton Kerr, Keiji Onishi, Yoshimitsu Hashizume:
    "Vehicle Aerodynamics Simulation for the Next Generation on the K-computer: Part 1 Development of the framework for fully unstructured grids up to 10 billion numerical elements"
    SAE International Journal of Passenger Cars – Mechanical Systems, 7(2): 2014-01-0621(2014)
  • 8.Wu-Shung Fu, Chung-Gang Li, Makoto Tsubokura, Yun Huang, J. A. Domaradzki:
    "An Investigation of Compressible Turbulent Forced Convection by an Implicit Turbulence Model for Large Eddy Simulation"
    Numerical Heat Transfer, PartA: Applications, vol.64, issue 11, pp.858-878 (2013)

Related Links

Lab Members

Principal investigator

Makoto Tsubokura
Team Leader

Core members

Keiji Onishi
Postdoctoral Researcher
Rahul Bale
Postdoctoral Researcher
Koji Nishiguchi
Postdoctoral Researcher
Wei-Hsiang Wang
Postdoctoral Researcher
Shigenobu Okazawa
Senior Visiting Scientist
Tetsuro Tamura
Senior Visiting Scientist
Nobuyuki Oshima
Senior Visiting Scientist
Ryoichi Kurose
Visiting Scientist
Chung-Gang Li
Visiting Scientist
Leif Niclas Jansson
Visiting Scientist
Andreas Lintermann
Visiting Scientist
Tsukasa Hori
Visiting Scientist
Jun Ikeda
Visiting Scientist
Duong Viet Dung
Visiting Scientist

Contact Information

Email: mtsubo [at] riken.jp