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Volume 23 (2009)
- Issue 4 Pages 197-
- Issue 3 Pages 148-
- Issue 2 Pages 98-
- Issue 1 Pages 14-
Volume 23, Issue 2
Displaying 1-2 of 2 articles from this issue
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Kyosuke Inada, Toshiyuki Tanaka, Satoru Uchida, Koji Takahashi, Motoo ...2009 Volume 23 Issue 2 Pages 98-104
Published: May 31, 2009
Released on J-STAGE: February 23, 2010
JOURNAL FREE ACCESSThis paper is a preliminary study for measurement of thermal conductivity of liquids with infinitesimal samples, which is much smaller than that required in conventional methods. A 50 nm-thick microbeam-type MEMS sensor fabricated across a trench on a silicon substrate was assumed to be submerged in a liquid sample. Numerical analysis of heat conduction within and around the uniformly-heated sensor showed that the temperature of the sensor reached a steady state within approximately 0.1ms, which was significantly shorter than the onset of natural convection. It was also revealed that the average temperature of the sensor at the steady state was higher in liquids with lower thermal conductivity. We therefore proposed a novel method to measure the liquid thermal conductivity at a steady state within an extremely short time, and discussed the measurement accuracy as well as dimensions required for a sensor.View full abstractDownload PDF (1080K) -
Tomoyuki Kumano, Katsunori Hanamura2009 Volume 23 Issue 2 Pages 105-110
Published: May 31, 2009
Released on J-STAGE: February 23, 2010
JOURNAL FREE ACCESSA spectral emittance of a ceramic plate coated with a rare-earth oxide thin film was investigated through one dimensional radiative transfer analysis. The emittance in the absorption bands around 1μm and 1.5μm increases with the film thickness, and then, approaching to the almost maximum value under the conditions of a 0.2mm film thickness and a 1mm substrate thickness.View full abstractDownload PDF (617K)
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