年次大会
Online ISSN : 2424-2667
ISSN-L : 2424-2667
セッションID: J0510204
会議情報
J0510204 近赤外光を用いた水溶液中の微小発熱領域の可視化
角田 直人山田 健太藤岡 良太近藤 克哉有本 英伸山田 幸生
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会議録・要旨集 フリー

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This paper introduces a novel method for imaging the temperature fields in water with a small heated sphere. This method is based on the temperature dependence of the absorption coefficient of water at the wavelength of 1150 nm. When a 1 mm diameter steel sphere in water contained in a rectangular glass cell with a light path length of 10 mm was heated inductively by a 760 kHz magnetic field, the absorbance images at this wavelength were acquired by using a near-infrared imaging system. The images showed that the absorbances around the sphere increased, corresponding to the heating power levels, and that a circularly symmetric distribution was formed by thermal conduction in a certain initial period and subsequently upward flow occurred by free convection. To the circularly symmetric distributions, inverse Abel transform was applied, and radial temperature distributions were reconstructed.
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© 2015 一般社団法人 日本機械学会
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