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Transport Phenomena Lab
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A lab that uncovers how heat and matter are carried in flows.
AboutAbout the lab
What flows carry, from fundamentals to engineering.
The Transport Phenomena Lab studies “transport phenomena,” in which momentum, energy, heat, and mass are carried within fluids.
Its aim is to understand the various transport phenomena in nature and industry from the fundamentals, and to improve the efficiency of fluid machinery.
The subjects extend beyond mechanical engineering to biomedical engineering, chemical engineering, fundamental physics, and atmospheric science.
The lab tries to use English as much as possible for communication within the lab.
Key terms
- Jet
- A flow that shoots out forcefully from a nozzle or gap. It is seen in engines and air conditioners
- Turbulence
- A flow in which large and small eddies are mixed together, making it look irregular
- Scalar
- A quantity, such as temperature or concentration, that has magnitude only and no direction
- Deep reinforcement learning
- Machine learning that combines deep neural networks with a framework of learning through trial and error which results are good or bad
NewsLab news
A paper by students et al. was published in Int. J. Heat Fluid Flow
A master's student received a best presentation award at the master's thesis interim presentation session
A master's student received a best presentation award at a lecture meeting of the Tokai Branch of The Japan Society of Mechanical Engineers
A doctoral student received the Graduate Student Research Encouragement Award from the Society of Automotive Engineers of Japan
ResearchResearch themes
The lab conducts basic research to understand the various transport phenomena in nature and industry, as well as engineering research aimed at improving the efficiency of fluid machinery. Centered on experiments and numerical simulations of jets and turbulence, it also works in biomedical engineering and energy.
*Illustrative imageHow jets entrain their surroundings
A jet spreads as it moves downstream and entrains the surrounding fluid. Through experiments measuring velocity and temperature, the lab clarifies how turbulence transports quantities in various jets and builds models of this process.
*Illustrative imageControlling how jets transport heat and matter
The lab studies methods to control jets, as seen in engines and air conditioners, using vortex generators (small protrusions that create vortices), and methods that use deep reinforcement learning to optimize injection conditions. Conditions that allow velocity and temperature to be controlled independently have also been found.
*Illustrative imageReducing the noise of sirocco fans
The noise of sirocco fans (blowers in car air conditioners) is thought to be caused by complex flow between the blades, but the details are not well understood. The lab analyzes the flow with numerical simulation to investigate how the noise is generated, and explores blade shapes that produce less noise.
*Illustrative imageTransport of energy and scalars in turbulence
Turbulence, though it looks random, has many common properties. Focusing on how energy and scalars are transported between eddies of different sizes in various flow fields, the lab seeks to clarify the causes of these phenomena.
MembersFaculty
The members of the Transport Phenomena Lab consist of faculty, students in the doctoral, master's, and undergraduate programs, and secretaries.As of 2026
- ProfessorYasumasa Ito
VoicesStudent voices
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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: “Flow-vector-heat-sink-fluid-WBG” Novel Concepts Inc / CC BY-SA 3.0 (cropped)
- How jets entrain their surroundings: “Jet engine simulation” Unnamed/unidentified federal employee / Public domain (cropped)
- Controlling how jets transport heat and matter: “VortexGenerators01” Ahunt at English Wikipedia / Public domain (cropped)
- Reducing the noise of sirocco fans: “Centrifugal fan static” EagleX / CC BY 3.0 (cropped)
- Transport of energy and scalars in turbulence: “Summer School Fluid Dynamics of Sustainability and the Environment ( )” École polytechnique - J.Barande (Ecole polytechnique Université Paris-Saclay Flickr account) / CC BY-SA 2.0 (cropped)
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