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Multiscale Transport Phenomena Lab
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The lab explores flow and transport phenomena, from molecules to granular materials.
AboutAbout the lab
Solving flow and transport, from molecules to groups of particles
The Multiscale Transport Phenomena Lab is jointly run by the Yamaguchi-Kusudo Group and the Tsuji-Washino Group, and studies topics such as liquid wetting and the flow of granular materials.
The Yamaguchi-Kusudo Group mainly uses molecular simulation to investigate how nanoscale structures at liquid surfaces, interfaces, and inside liquids determine surface tension, viscosity, wetting, and other properties.
The Tsuji Group and the Washino Group investigate granular materials and flows in which particles and fluid are mixed, using numerical models such as the discrete element method.
The lab accepts fourth-year undergraduate students in the Mechanical Engineering Course of the Department of Applied Science and Engineering, and graduate students in the Department of Mechanical Engineering.
Key terms
- Wetting
- A phenomenon involving the contact line (three-phase contact line) where the solid, liquid, and gas interfaces meet
- Granular materials
- Collections of particles that are individually solid but behave like a solid, liquid, or gas when gathered together
- Discrete element method
- A method that tracks and computes the motion of each particle individually to investigate the behavior of the whole group of particles
NewsLab news
Associate Professor Washino received the Paper Award from the Japanese Society for Multiphase Flow
Associate Professor Tsuji received the 2025 Paper Award from the Japanese Society for Multiphase Flow
A paper by Associate Professor Tsuji and colleagues was published in Advanced Powder Technology
A master's student received the Eiji Muto Award, Outstanding Student Award from the Japan Society for Design Engineering, and an undergraduate student received the Encouragement Award, Student Award from the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan
A paper by Professor Yamaguchi and colleagues received the 2025 Paper Award from the Japan Society of Fluid Mechanics
ResearchResearch themes
The Multiscale Transport Phenomena Lab is jointly run by the Yamaguchi-Kusudo Group and the Tsuji-Washino Group. It investigates liquid interfaces and wetting, as well as granular materials and flows containing particles, using molecular simulation, numerical models, and experimental methods.
*Illustrative imageLiquid Wetting Explored from Nanoscale Molecules
The lab mainly uses molecular simulation to investigate how nanometer-scale structures at liquid surfaces, interfaces, and inside liquids determine macroscopic properties and behavior such as surface tension, viscosity, and wetting.
*Illustrative imageCoupled Simulation of Particles and Flow
For dense groups of particles in a gas flow, the lab proposes and further develops the DEM-CFD coupling method, which combines the discrete element method, treating each particle individually, with spatially averaged flow calculations.
*Illustrative imageMotion of Large Objects in Dense Gas-Solid Two-Phase Flow
In dense gas-solid two-phase flow with a wide range of particle sizes, segregation occurs, in which particles become unevenly distributed by size. The lab proposed the virtual particle method as a numerical model for handling this flow.
*Illustrative imageNumerical Models of Flows Containing Particles
The lab builds numerical models of flows of particles and fluid using computational fluid dynamics and the discrete element method. It develops models in the areas of detailed flow, averaged flow, particle flow, and faster computation.
MembersFaculty
The members of the Multiscale Transport Phenomena Lab consist of faculty, doctoral, master's, and undergraduate students, and administrative assistants.As of 2026
- ProfessorYasutaka Yamaguchi
- Associate ProfessorTakuya Tsuji
- Associate ProfessorKimiaki Washino
- Assistant ProfessorHiroki Kusudo
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Illustration of effect of Stokes number on particle in flowing air” Richard Sear / CC BY-SA 4.0 (cropped)
- Liquid Wetting Explored from Nanoscale Molecules: “Surface Tension 01” Kuebi Armin Kübelbeck / CC BY-SA 3.0 (cropped)
- Coupled Simulation of Particles and Flow: “Hourglass with flowing sand” Pauloleong2002 / CC BY-SA 4.0 (cropped)
- Motion of Large Objects in Dense Gas-Solid Two-Phase Flow: “Fluidized Bed Concentrator (FBC)” TKS Industrial / CC BY-SA 4.0 (cropped)
- Numerical Models of Flows Containing Particles: “Moscow State University granular material” Artyom Svetlov / CC BY 4.0 (cropped)
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- Related lab (Sustainable System Design Lab): “Life Cycle Thinking Product System” The National Institute of Standards and Technology (NIST) / Public domain (cropped)
- Related lab (Nano Fabrication and Metrology Lab): “NASA Tests LISA Development Units (SVS14955 - LISA TVAC-9)” NASA's Scientific Visualization Studio - eMITS/Sophia Roberts, eMITS/Scott Wiessinger, University of Maryland College Park/Jeanette Kazmierczak, ADNET Systems, Inc./Aaron E. Lepsch / Public domain (cropped)
- Related lab (Micro Dynamics Lab): “Universal testing machine” Ganitz / CC BY-SA 4.0 (cropped)
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