Local measurement of forced convection heat transfer in a micro glass tube

B. Schilder, S. C.M. Yu, N. Kasagi, S. Hardt, P. Stephan

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

The pressure drop and the convective heat transfer characteristics of ethanol and water in a 600 μm diameter tube with and without phase change has been studied experimentally. The test section consists of a glass tube coated with a transparent ITO (indium tin oxide) heater film. For single phase flow it was found that the measured Nusselt numbers and friction factors are in good agreement with the theoretical values expected from Poiseuille flow. Subsequently, the boiling heat transfer of ethanol was studied. It was found that boiling with bubble growth in both upstream and downstream directions leaving behind a thin evaporating liquid film on the tube wall is the dominant phase change process. Local Nusselt numbers are calculated for the two phase flow at different heat fluxes and Reynolds numbers. Compared to single phase flow the heat transfer is enhanced by a factor of 3 to 8.

Original languageEnglish
Title of host publicationProceedings of the 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008
Pages543-550
Number of pages8
EditionPART A
DOIs
Publication statusPublished - 1 Dec 2008
Externally publishedYes
Event6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008 - Darmstadt, Germany
Duration: 23 Jun 200825 Jun 2008

Publication series

NameProceedings of the 6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008
NumberPART A

Conference

Conference6th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2008
Country/TerritoryGermany
CityDarmstadt
Period23/06/0825/06/08

ASJC Scopus subject areas

  • Process Chemistry and Technology

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