Small channels have been an area of interest since the 1970s owing to their enhanced heat transfer characteristics. However a wide number of studies in literature show inconsistent results. In this work, an experimental set-up has been designed and constructed to investigate pressure drop and heat transfer characteristics of single-phase water flow in rectangular multiport minichannels. Laminar flow inside three minichannels with different hydraulic diameters and different port numbers were examined under a constant heat flux boundary condition. The results are presented in terms of Poiseuille number (Po) and average Nusselt number (Nu). Generally, average Nusselt number results and Poiseuille number results showed good agreement with constant Po theory and constant Nu theory, excluding developing effects and experimental errors. On the other hand, developing effects are found to be increasing as hydraulic diameter decreases. Similarly, constant Nu value showed a decrease with increasing hydraulic diameter. The experimental results are compared with conventional correlations. While the agreement with conventional correlations is satisfactory, the predictions of the correlations overestimated most of the results. No early transition was observed for Reynolds number (Re) smaller than 1800.
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ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting
August 3–7, 2014
Chicago, Illinois, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4627-8
PROCEEDINGS PAPER
Experimental Investigation of Single-Phase Liquid Flow and Heat Transfer in Multiport Minichannels
Mesru Altinoz,
Mesru Altinoz
Middle East Technical University, Ankara, Turkey
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Almila Guvenc Yazicioglu,
Almila Guvenc Yazicioglu
Middle East Technical University, Ankara, Turkey
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Derek Baker
Derek Baker
Middle East Technical University, Northern Cyprus Campus, Ankara, Turkey
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Mesru Altinoz
Middle East Technical University, Ankara, Turkey
Almila Guvenc Yazicioglu
Middle East Technical University, Ankara, Turkey
Derek Baker
Middle East Technical University, Northern Cyprus Campus, Ankara, Turkey
Paper No:
ICNMM2014-21481, V001T02A004; 8 pages
Published Online:
December 17, 2014
Citation
Altinoz, M, Yazicioglu, AG, & Baker, D. "Experimental Investigation of Single-Phase Liquid Flow and Heat Transfer in Multiport Minichannels." Proceedings of the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting. ASME 2014 12th International Conference on Nanochannels, Microchannels and Minichannels. Chicago, Illinois, USA. August 3–7, 2014. V001T02A004. ASME. https://doi.org/10.1115/ICNMM2014-21481
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