Papers - Nagasaka, Yuji

Theory and Experiment of the Soret Forced Rayleigh Scattering Technique for Mass Diffusion Coefficient Measurement of Binary Liquid Mixtures

Matsuura H., Nagasaka Y.

International Journal of Thermophysics 45 ( 8 )  2024.08

ISSN  0195928X

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Mass diffusion coefficient measurement techniques with high temporal and spatial resolution have become essential for the research and development of leading-edge technology in a wide range of cross-disciplinary fields, but cannot be achieved using conventional methods. We provide a comprehensive review of the state-of-the-art theoretical and experimental investigations on Soret forced Rayleigh scattering (SFRS), a grating excitation technique (GET) for measuring the mass diffusion coefficient of binary liquid mixtures. SFRS utilizes the Soret effect to create micrometer-order periodic spatial concentration modulation in a sample due to the absorption of an optical interference grating generated by two intersecting heating laser beams. The decay of the concentration modulation by the mass diffusion process within several milliseconds is detected by the diffraction of a probing beam. The theoretical considerations regarding deviations from the ideal mass diffusion conditions are the effects of: (1) the Gaussian beam intensity distribution, (2) the light absorbing material and (3) the cell wall. The proper settings for the optical system are also analyzed, e.g., the effect of coherency and polarization of the heating laser and the effect of the z-direction length of the interference region. We also consider the frame of reference, center of gravity invariance and effect of convection, which are particularly important for mass diffusion experiments. Using the correct implementation of the theory, the optimal SFRS apparatus design and its appropriate use are described in detail. Finally, two successful applications of SFRS are demonstrated using visible light laser heating and mid-wavelength infrared gas laser heating.

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Advanced Passive Thermal Control Materials and Devices for Spacecraft: A Review

Tachikawa S., Nagano H., Ohnishi A., Nagasaka Y.

International Journal of Thermophysics 43 ( 6 )  2022.06

ISSN  0195928X

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In recent planetary exploration space missions, spacecraft are exposed to severe thermal environments that are sometimes more extreme than those experienced in earth orbits. The development of advanced thermal control materials and devices together with reliable and accurate measurements of their thermophysical properties are needed for the development of systems designed to meet the engineering challenges associated with these space missions. We provide a comprehensive review of the state-of-the-art advanced passive thermal control materials and devices that are available for space applications, specifically, variable emissivity thermal control materials and microelectromechanical systems (MEMS), radiofrequency (RF)-transparent and/or tunable solar absorptivity and total hemispherical emissivity thermal control materials, and a passive re-deployable radiator with advanced materials and insulation. Prior to our in-depth review of these thermal control materials, we briefly summarize the thermal environments surrounding spacecraft, the characteristics of thermophysical properties for spacecraft materials that differ from those of materials for ground use, and the significance of solar absorptivity and total hemispherical emissivity for passive thermal control in space. In all four topics of materials and devices, the following subjects are overviewed: the basic principle of passive thermal control techniques in space, the measurement of thermophysical properties of those novel materials, simulation and/or on-orbit verification thermal performance tests, degradation tests in space environments, and some aspects of the implementation of the above-described materials and devices in actual space missions.

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Rapid and label-free sensing of intermolecular interactions using compact optical diffusion sensor

Kamata, M., Takaba, Y., Taguchi. Y. and Nagasaka, Y.

International Journal of Heat and Mass Transfer 133   73 - 79 2019.04

Research paper (scientific journal)

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Non-contact optical hand-held viscosity sensor with incident angle and irradiation timing controls

Eguchi, M., Taguchi, Y. and Nagasakam Y.

Optics Express 26 ( 26 ) 34070 - 34080 2018.12

Research paper (scientific journal)

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Non-contact Concentration Sensing Technique of Aqueous Solutions of Glucose at Low Concentration Range – Development of Rotating Half-wave Retarder Method with Two Probing Lasers for Detecting Small Optical Rotation –

OIKAWA HIROMI, NAGASAKA YUJI

熱物性 32 ( 4 )  2018.11

Research paper (scientific journal), Joint Work

Measurement of Low Thermal Conductivity using New Correction Method under Vacuum

TOMIOKA KOTA, OZEKI SHUNTARO, TACHIKAWA SUMITAKA, OMURA TAKAHIRO, NAGASAKA YUJI

熱物性 32 ( 3 ) 104 - 111 2018.07

Research paper (scientific journal), Joint Work

Design of an Optofluidic Diffusion Sensor by Transient Grating using Dielectrophoresis

KAMATA MAKOTO, TAGUCHI YOSHIHIRO, NAGASAKA YUJI

Optics Express 26 ( 13 ) 16970 - 16983 2018.06

Research paper (scientific journal), Joint Work

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Development of Measurement Technique of Mass Diffusion Coefficient of Aqueous Methanol Solutions in Polymer Electrolyte Membranes Based on Infrared Soret Forced Rayleigh Scattering Method using Single Crystal Diamond Window in a Sample Cell

MATSUURA HIROAKI, TOKUDA DAICHI, NAGASAKA YUJI

Journal of Thermal Science and Technology 13 ( 1 ) 1 - 12 2018.05

Research paper (scientific journal), Joint Work

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Development of Optical Hand-held Viscosity Sensor for Simple and Quick in situ Measurement

EGUCHI MASATO, TAGUCHI YOSHIHIRO, NAGASAKA YUJI

日本機械学会論文集 84 ( 860 ) 17 - 29 2018.04

Research paper (scientific journal), Joint Work

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Soret forced Rayleigh scattering instrument for simultaneous detection of two- wavelength signals to measure Soret coefficient and thermodiffusion coefficient in ternary mixtures

MATSUURA HIROAKI, NAGASAKA YUJI

Review of Scientific Instruments 89, 024903   1 - 12 2018.02

Research paper (scientific journal), Joint Work

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2017年日本熱物性学会賞の授賞と名誉員の顕彰についての報告

NAGASAKA YUJI

Japan Journal of Thermophysical Properties 32 ( 1 ) 2 - 3 2018.02

Research paper (scientific journal), Single Work

Decay Time Control of Mass Diffusion in a Transient Grating using a Fringe-tunable Electrothermal Fresnel Mirror

KIUCHI YUKI, TAGUCHI YOSHIHIRO, NAGASAKA YUJI

Journal of Thermal Science and Technology 12 ( 2 ) 17-00301/1 - 11 2017.09

Research paper (scientific journal), Joint Work

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Measurement of Out-of-Plane Thermal Conductivity of Epitaxial YBa2Cu3O7-δ Thin Films in the Temperature Range from 10 K to 300 K by Photothermal Reflectance

MURAKAMI YUSUKE, GOTO HARUNA, TAGUCHI YOSHIHIRO, NAGASAKA YUJI

Int. J. Thermophys 38:160   1 - 22 2017.09

Research paper (scientific journal), Joint Work

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平成28 年度日本伝熱学会賞選考の報告

NAGASAKA YUJI

伝熱 56(236)   3 - 4 2017.07

Research paper (scientific journal), Single Work

Editorial Preface

NAGASAKA YUJI, TSUJI TOMOYA

Fluid Phase Equilibria (ATPC2016 Special Issue) 441   1 2017.06

Research paper (scientific journal), Joint Work

Development of Measurement Technique for Soret Coefficient and Thermodiffusion Coefficient of Ternary Systems by Soret Forced Rayleigh Scattering Method with Two Probing Lasers of Different Wavelengths

MATSUURA HIROAKI,NAGASAKA YUJI

Japan Journal of Thermophysical Properties 31 ( 2 ) 89 - 96 2017.05

Research paper (scientific journal), Joint Work

2016年日本熱物性学会賞の授賞と名誉員の顕彰についての報告

NAGASAKA YUJI

Japan Journal of Thermophysical Properties 31 ( 1 ) 2 - 3 2017.02

Research paper (scientific journal), Single Work

Fringe-tunable electrothermal Fresnel mirror for use in compact and high-speed diffusion sensor

YUKI KIUCHI, YOSHIHIRO TAGUCHI, NAGASAKA YUJI

Optics EXPRESS 25 ( 2 ) 758 - 767 2017.01

Research paper (scientific journal), Joint Work

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Nanoscale optical thermometry using a time-correlated single-photon counting in an illumination-collection mode

SETO DAICHI, NIKKA REN, NISHIO SHOGO, TAGUCHI YOSHIHIRO, SAIKI TOSHIHARU, NAGASAKA YUJI

Appl. Phys. Lett. (American Institute of Physics)  110 ( 3 ) 0 - 4 2017.01

Research paper (scientific journal), Joint Work

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Development of Micro Optical Diffusion Sensor utilizing Laser-Induced Dielectrophoresis with Sputtered a-Si:H

KAMATA MAKOTO, YAMADA KAN, TAGUCHI YOSHIHIRO, NAGASAKA YUJI

Japan Journal of Thermophysical Properties 30 ( 2 ) 74 - 79 2016.05

Research paper (scientific journal), Joint Work