Experimental study of the relation between heat transfer and flow behavior in a single microtube

Shih Che Huang, Osamu Kawanami, Kazunari Kawakami, Itsuro Honda, Yousuke Kawashima, Haruhiko Ohta

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The flow boiling heat transfer in microchannels have become important issue because it is extremely high-performance heat exchanger for electronic devices. For a detailed study on flow boiling heat transfer in a microtube, we have used a transparent heated microtube, which is coated with a thin gold film on its inner wall. The gold film is used as a resistance thermometer to directly evaluate the inner wall temperature averaged over the entire temperature measurement length. At the same time, the transparency of the film enables the observation of fluid behavior. Flow boiling experiments have been carried out using the microtube under the following conditions; mass velocity of 105 kg/m2 s, tube diameter of 1 mm, heat flux in the range of 10 ~ 380 kW/m2 s, and the test fluid used is ionized water. Under low heat flux conditions, the fluctuations in the inner wall temperature and mass velocity are closely related; the frequency of these fluctuations is the same. However, the fluctuations in the inner wall temperature and heat transfer coefficient are found to be independent of the fluctuation in the mass velocity under high heat flux conditions.

Original languageEnglish
Pages (from-to)193-197
Number of pages5
JournalMicrogravity Science and Technology
Volume20
Issue number3-4
DOIs
Publication statusPublished - Sep 1 2008

Fingerprint

Heat Flow
heat transmission
Boiling liquids
Heat flux
Heat Transfer
Experimental Study
wall temperature
heat transfer
Heat Flux
boiling
Fluctuations
Heat transfer
heat flux
Gold
Fluids
Thermometers
gold
Microchannels
Thermometer
Fluid

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Engineering(all)
  • Physics and Astronomy(all)
  • Applied Mathematics

Cite this

Experimental study of the relation between heat transfer and flow behavior in a single microtube. / Huang, Shih Che; Kawanami, Osamu; Kawakami, Kazunari; Honda, Itsuro; Kawashima, Yousuke; Ohta, Haruhiko.

In: Microgravity Science and Technology, Vol. 20, No. 3-4, 01.09.2008, p. 193-197.

Research output: Contribution to journalArticle

Huang, Shih Che ; Kawanami, Osamu ; Kawakami, Kazunari ; Honda, Itsuro ; Kawashima, Yousuke ; Ohta, Haruhiko. / Experimental study of the relation between heat transfer and flow behavior in a single microtube. In: Microgravity Science and Technology. 2008 ; Vol. 20, No. 3-4. pp. 193-197.
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