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Thermal Fluid Physics Lab
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A thermal engineering lab that investigates how heat is transported at the atomic and electronic scale.
AboutAbout the lab
Pushing past the limits of heat transport technology.
The Thermal Fluid Physics Lab studies how heat is transported (heat transport) from the atomic and electronic scale, conducting research aimed at overcoming the limits of conventional heat transport technology.
The lab elucidates heat transport phenomena through verification experiments using MEMS technology and high-speed infrared cameras, together with theory that incorporates applied physics such as phonons and photons.
Its work spans basic to applied research, including thermal utilization of solar energy and improving the efficiency of thermoelectric semiconductors, which convert heat directly into electricity.
Key terms
- Thermoelectric generation
- A power generation method that uses semiconductors to produce electricity directly from heat
- Radiative cooling
- A phenomenon in which a material that reflects sunlight and has strong infrared emissivity cools down without being heated
- Lattice vibrations
- Vibrations of atoms in a solid. Together with electrons, they carry thermal energy within the solid
- 3ω method
- A measurement method in which an alternating current is passed through a thin wire and temperature is determined from the voltage at three times the angular frequency
ResearchResearch themes
The lab investigates how heat is transported from the atomic and electronic scale and takes on research to overcome the limits of conventional heat transport technology. Its work includes thermoelectric generation, control of wavelength-selective thermal radiation, microscale analysis and measurement of heat conduction, and hydrogen generation that uses natural processes.
*Illustrative imageThermoelectric Conversion with Solution-Processable Semiconductors
Thermoelectric generation, which uses semiconductors to produce electricity directly from heat, could become low-cost if the devices can be made by printing. The lab is researching the application of halide perovskites, which are solution-processable semiconductors, to thermoelectric generation.
*Illustrative imageMaterials That Control Heat by Selecting Wavelengths
A material that absorbs sunlight heats up, and one that reflects it does not; if its infrared emissivity is strong, it can even be cooled (radiative cooling). The lab researches materials with wavelength-selective radiative properties that can regulate temperature without any power input.
*Illustrative imageAnalyzing Heat Transport from the Atomic Level
In solids, thermal energy is carried by electrons and lattice vibrations, and in semiconductors and insulators, studying lattice vibrations reveals the details of heat conduction. The lab calculates the motion of individual atoms to investigate the detailed mechanisms of heat transport.
*Illustrative imageMeasuring Thermal Conductivity with the 3ω Method
The lab measures thermal conductivity, which is needed in many kinds of thermal design, using the 3ω method. Fabricating a thin wire 30 μm wide on the surface of the target allows heating and temperature measurement at the same time, and the temperature can be determined from the voltage at angular frequency 3ω.
MembersFaculty
Members of the Thermal Fluid Physics Lab include faculty, researchers, secretaries, and master's and undergraduate students.As of 2026
- Senior ProfessorKoji Miyazaki
- Assistant ProfessorKatsuaki Hashikuni
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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: “Flir E8-Thermal imaging camera-Thermographic camera-02ASD” Asurnipal / CC BY-SA 4.0 (cropped)
- Thermoelectric Conversion with Solution-Processable Semiconductors: “Copper-zinc coating modified by chloride” DenisovaAG / CC BY-SA 4.0 (cropped)
- Materials That Control Heat by Selecting Wavelengths: “Passive daytime radiative cooling diagram” NiAxolotl / CC BY-SA 4.0 (cropped)
- Analyzing Heat Transport from the Atomic Level: “Visual Molecular Dynamics visualization” Toughpkh / Public domain (cropped)
- Measuring Thermal Conductivity with the 3ω Method: “Modified Transient Plane Source (MTPS) Thermal Conductivity Sensor” ThermalGuru / CC BY-SA 4.0 (cropped)
- Related lab (熱物理工学研究室): “Thermal Conductivity Measurement, Modified Transient Plane Source Technique” JimRocket / CC BY-SA 3.0 (cropped)
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- Related lab (システム工学研究室): “SingularityU The Netherlands Summit )” Sebastiaan ter Burg / CC BY 2.0 (cropped)
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