EXPERIMENTAL INVESTIGATION OF SINGLE-PHASE LIQUID FLOW AND HEAT TRANSFER IN MULTIPORT MINICHANNELS

Date

2014-08-07

Author

Altinoz, Mesru
Güvenç Yazıcıoğlu, Almıla
Baker, Derek Keıth

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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) over bar 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) over bar 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.

Subject Keywords

Rectangular Microchannels, Friction

URI

https://hdl.handle.net/11511/55480

Conference Name

12th International Conference on Nanochannels, Microchannels and Minichannels (ICNMM)

Collections

Department of Mechanical Engineering, Conference / Seminar

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Citation Formats

M. Altinoz, A. Güvenç Yazıcıoğlu, and D. K. Baker, “EXPERIMENTAL INVESTIGATION OF SINGLE-PHASE LIQUID FLOW AND HEAT TRANSFER IN MULTIPORT MINICHANNELS,” presented at the 12th International Conference on Nanochannels, Microchannels and Minichannels (ICNMM), Chicago, IL, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55480.