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2001 Fiscal Year Final Research Report Summary

Thermophysical Properties of Molten Silicon

Research Project

Project/Area Number 12450091
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionKeio University

Principal Investigator

NAGASAKA Yuji  Keio University, System Design Eng., Professor, 理工学部, 教授 (40129573)

Project Period (FY) 2000 – 2001
KeywordsThermophysical Properties / Measurement Techniques / Foods / Viscosity / Surface Tension
Research Abstract

A new experimental apparatus based on the laser induced capillary wave technique by using pulsed CO_2 laser (wavelength: 10.6 μm, pulse width: 50 ns, output energy: 65 mJ) as a heating source has been developed. In this method, pulsed two high-power laser beams intersect on a sample surface and they generate spatially sinusoidal temperature distribution. The temperature distribution of the thermal grating creates capillary wave on the surface by the thermal expansion (the amplitude of the wave is about 10 nm). The capillary wave is detected by a diffracted probe beam at the heated area on the surface.
The results obtained from the present research are summarized as follows.
1. We have developed a new experimental apparatus by using pulsed CO_2 laser and established experimental techniques to detect a stable signal with this apparatus.
2. The signal from low viscosity materials such as toluene showed the damping oscillation. In the case of high viscosity materials such as glycerol, we detected the overdamped wave. The application of laser induced capillary wave method has considerable potential for the measurement of wide viscosity range.
3. Detected signal from toluene was very well in agreement with theoretically calculated wave forms considering the temperature dependence of surface tension.

  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 横田裕弘: "レーザ誘起表面波による粘性率測定に関する研究(第2報)"第37回日本伝熱シンポジウム講演論文集. 37. 913-914 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 木戸良彦: "レーザ誘起表面波による粘性率測定に関する研究(第3報パルスCO_2レーザを用いた実験装置の開発)"第38回日本伝熱シンポジウム講演論文集. 38. 543-544 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoshihiko Kido: "Development of laser induced capillary wave technique for viscosity measurement using pulsed CO_2 laser"Proceedings of The Sixth Asian Thermophysical Properties Conference. 6. 411-416 (2001)

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      「研究成果報告書概要(和文)」より
  • [Publications] 木戸良彦: "レーザ誘起表面波による粘性率測定に関する研究(第4報表面波発生のメカニズム)"第39回日本伝熱シンポジウム講演論文集. 39(発表予定). (2002)

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      「研究成果報告書概要(和文)」より
  • [Publications] 長坂雄次: "光学測定と熱物性(伝熱工学の進展第3巻)"養賢堂. 126 (2000)

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      「研究成果報告書概要(和文)」より
  • [Publications] Yokota, Y.: "Application of laser induced capillary wave for viscosity measurement (2nd Report)"Proc. 37th National Heat Transfer Symposium of Japan. 913-914 (2000)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Kido, Y.: "Application of laser induced capillary wave for viscosity measurement (3rd Report, Development of a new experimental apparatus by Using pulsed C0_2 laser)"Proc. 38th National Heat Transfer Symposium of Japan. 543-544 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kido, Y.: "Development of laser induced capillary wave technique for viscosity measurement using pulsed C0_2 laser"Proc. 6th Asian Thermophysical Properties Conference. 411-416 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kido, Y.: "Application of laser induced capillary wave for viscosity measurement (4th Report, Mechanism of the capillary wave generation)"Proc. 39th National Heat Transfer Symposium of Japan. (to be presented). (2002)

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Published: 2003-09-17  

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