Netsu Bussei
Online ISSN : 1881-414X
Print ISSN : 0913-946X
ISSN-L : 0913-946X
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Volume 26, Issue 1
Displaying 1-2 of 2 articles from this issue
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paper
  • Development of non-contact technology for measuring viscosity using breakup of rotating drop
    Tomoyuki MAEKAWA, Satoshi MATSUMOTO, Yutaka ABE, Akiko KANEKO
    2014 Volume 26 Issue 1 Pages 9-14
    Published: 2014
    Released on J-STAGE: December 31, 2014
    DOIhttps://doi.org/10.2963/jjtp.26.9
    JOURNAL FREE ACCESS
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    The electrostatic levitation is utilized as one of the containerless processing techniques. Some recent investigations focus on thermal property measurement of high temperature molten metals with an oscillating droplet method. For example, viscosity has been estimated from the damping constant. However, this method is limited to the low viscosity fluid. Thus, the purpose of the present study is to develop method of wide viscosity measurement on a levitated liquid droplet. In the present study, the droplets with kinds of viscosity were levitated by the electrostatic force. Droplet deformation was induced by applying rotation. The followings are obtained connection rotational breakup and viscosity. The observed dynamics indicated that it is possible to measure physical property of levitated droplet.
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  • Specific Heat Capacity of Constantan in the Temperature Range 103K-303K
    Masato Akamatsu, Mitsuo Higano
    2014 Volume 26 Issue 1 Pages 15-21
    Published: 2014
    Released on J-STAGE: December 31, 2014
    DOIhttps://doi.org/10.2963/jjtp.26.15
    JOURNAL FREE ACCESS
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    The specific heat capacity at constant pressure of SAMA constantan as a negative thermoelement of the J-Type thermocouple is measured with a power-compensated differential scanning calorimeter (DSC) in the temperature range 103 K-303 K. This is done because very few data on the specific heat capacity of thermocouple materials over a wide temperature range exist. The specific heat capacity of high purity copper as a standard reference material is also measured to estimate the uncertainty of DSC measurements. The result on SAMA constantan is compared to literature values, and is correlated with the 6th order of polynomial equation as a function of temperature. The validity of Kopp-Neumann law for the specific heat capacity of SAMA constantan is also discussed.
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