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Thermal Exchange of Glass Micro-Fibers Measured by the 3ω Technique
- Source :
- Journal of Heat Transfer, Journal of Heat Transfer, American Society of Mechanical Engineers, 2020, 142 (10), pp.101701. ⟨10.1115/1.4047501⟩
- Publication Year :
- 2020
- Publisher :
- ASME International, 2020.
-
Abstract
- In this work, we propose an experimental setup to measure the thermal conductivity and specific heat of a single suspended glass fiber, as well as the thermal contact resistance between two glass fibers. By using optical lithography, wet and dry etching and thin film deposition, we prepared suspended glass fibers that are coated by niobium nitride (NbN) thin film used as room temperature thermal transducer. By using the 3ω technique, the thermal conductivity of glass fiber was measured to be 1.1 W m−1 K–1 and specific heat 0.79 J g−1 K–1 around 300 K under vacuum conditions. By introducing exchange gas into the measurement chamber, influence of the gas on the heat transfer was studied, and the convection coefficient h for all the measurement ranges from a pressure of 0.01 hPa to 1000 hPa, over more than five orders of magnitude, has been obtained. By adding a bridging glass fiber on top of two other suspended glass fibers, it was possible to estimate the thermal contact resistance between two glass fibers Rc in the range of 107–108 K W–1.
- Subjects :
- 010302 applied physics
Convection
Materials science
Mechanical Engineering
Glass fiber
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Mechanics of Materials
0103 physical sciences
Thermal
General Materials Science
[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics
Composite material
0210 nano-technology
ComputingMilieux_MISCELLANEOUS
[PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
Subjects
Details
- ISSN :
- 15288943 and 00221481
- Volume :
- 142
- Database :
- OpenAIRE
- Journal :
- Journal of Heat Transfer
- Accession number :
- edsair.doi.dedup.....1048f53074c09432f3e1a6ff35d6ed62