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Flow Control Lab
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This lab measures flows with ultrasound and light to take on both open problems in fluid dynamics and challenges facing society.
AboutAbout the lab
Taking on the mysteries of flow with new experimental tools
The Flow Control Lab tackles unsolved problems in fluid dynamics by developing experimental tools that did not exist before.
In particular, it is one of the international centers for developing techniques that use ultrasound and light to visualize and measure flows.
Its research subjects include turbulence, convection, multiphase flow, and non-Newtonian fluids.
As applications, the lab works on development in the fields of ships, wind power, food, and resources.
Key terms
- Multiphase flow
- A flow in which two or more of gas, liquid, and solid are mixed and flow together
- Non-Newtonian fluid
- Unlike water or air, a fluid whose properties, such as viscosity, change depending on how force is applied
- Rheology
- The study of how easily a material flows and how it deforms
ResearchResearch themes
Using measurement techniques based on light and ultrasound that the lab developed itself, it studies the physics hidden in turbulence, multiphase flows, and complex fluids. At the same time, it pursues fluid engineering research that responds to societal challenges, such as reducing greenhouse gas emissions.
*Illustrative imageReducing ship frictional drag with bubbles
The lab studies air lubrication, a method that injects bubbles into the turbulence along a ship's hull surface to reduce frictional drag on the wall. In cooperation with shipping and shipbuilding companies and the National Maritime Research Institute, it works on experiments to confirm the mechanism, a system to monitor bubble flow under the hull, and methods to control the bubble flow.
*Illustrative imageMeasuring liquid properties with ultrasound
The lab developed a method, ultrasonic spinning rheometry (USR), that oscillates a liquid in a cylindrical container, measures the velocity distribution inside it with ultrasound, and determines the liquid's rheological properties. It is applied to liquids containing bubbles or particles, polymer solutions, food, and more.
*Illustrative imageImproving wind turbine performance
Using three wind tunnel facilities, the lab tests wind turbines with various operating principles. It works on projects such as the turbo-sail wind turbine, which uses part of the generated power to create jets on the blade surface and prevent stall.
MembersFaculty
The members of the Flow Control Lab are faculty, visiting faculty, secretaries, technical advisors, doctoral, master's, and undergraduate students, and research students and short-term visiting students.
- ProfessorYuji Tasaka
- Assistant ProfessorHyunjin Park
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: “F-16XL Scamp Flow Visualization Test - GPN” NASA / Public domain (cropped)
- Reducing ship frictional drag with bubbles: “Ships wake ( )” Rennett Stowe from USA / CC BY 2.0 (cropped)
- Measuring liquid properties with ultrasound: “Taylor Wirbel 02” Jürgen Wagner / CC BY-SA 4.0 (cropped)
- Improving wind turbine performance: “Taylor Wirbel 02” Jürgen Wagner / CC BY-SA 4.0 (cropped)
- Related lab (熱輸送システム): “International Space Station radiators ESA21793420” European Space Agency / CC BY-SA 3.0 igo (cropped)
- Related lab (計算流体工学・宇宙輸送工学): “LES Turbulent Velocity Field” Charlesreid1 / CC BY-SA 3.0 (cropped)
- Related lab (マイクロバイオメカニクス): “Fibroblastid” Heiti Paves / CC BY-SA 3.0 (cropped)
- Related lab (宇宙環境応用工学): “Candle Flame in Microgravity” NASA / Public domain (cropped)
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