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Heat Transfer in Liquid–Liquid Taylor Flow in Miniscale Curved Tubing for Constant Wall Temperature

[+] Author and Article Information
Wesam Adrugi

Mem. ASME
Department of Mechanical Engineering,
Memorial University of Newfoundland,
St. John's, NL A1B 3X5, Canada
e-mail: w.m.adrugi@mun.ca

Yuri Muzychka

Fellow ASME
Department of Mechanical Engineering,
Memorial University of Newfoundland,
St. John's, NL A1B 3X5, Canada
e-mail: y.s.muzychka@mun.ca

Kevin Pope

Mem. ASME
Department of Mechanical Engineering, Memorial University of Newfoundland,
St. John's, NL A1B 3X5, Canada
e-mail: kpope@mun.ca

1Corresponding author.

Contributed by the Electronic and Photonic Packaging Division of ASME for publication in the JOURNAL OF ELECTRONIC PACKAGING. Manuscript received December 16, 2016; final manuscript received March 28, 2017; published online June 12, 2017. Assoc. Editor: Justin A. Weibel.

J. Electron. Packag 139(2), 020909 (Jun 12, 2017) (7 pages) Paper No: EP-16-1141; doi: 10.1115/1.4036405 History: Received December 16, 2016; Revised March 28, 2017

In this paper, heat transfer enhancement using liquid–liquid Taylor flow in miniscale curved tubing for isothermal boundary conditions is examined. Copper tubing with an inner tube diameter of D = 1.65 mm and different radii of curvature and lengths is used in the experiments. Taylor flow is created using water and low-viscosity silicone oils (0.65 cS, 1 cS, and 3 cS) to examine the effect of Prandtl number on heat transfer rates in curved tubing. A series of experiments are conducted using tubing with constant length and variable curvature as well as variable length and constant curvature. The experimental results are compared with models for liquid–liquid Taylor flow in straight tubing and single-phase flow in curved tubes. The results of the research highlight the effects of liquid–liquid Taylor flow in curved tubing. This research provides new insights into the effect of curvature on heat transfer enhancement for liquid–liquid Taylor flow in miniscale curved tubing, at a constant wall temperature.

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Figures

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Fig. 3

Illustration of water/1 cS silicone oil of segmented flow for αL = 0.5. The water has been tinted for enhanced visualization of the interface.

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Fig. 2

Test geometries of different lengths and radii

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Fig. 1

System configuration

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Fig. 8

Heat transfer enhancement with different radius of curvature for water/3 cS oil Taylor flow with L = 6.28 cm

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Fig. 4

Benchmarking results for a straight tube with 10% error bars

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Fig. 5

Single-phase flow model comparison for the experimental results of water/1 cS oil Taylor flow at R = 4 cm and L = 25.12 cm

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Fig. 6

Single-phase flow model comparison for the experimental results for water/3 cS oil Taylor flow at R = 4 cm and L = 12.56 cm

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Fig. 7

Heat transfer enhancement with different radius of curvature for water/1 cS oil Taylor flow with L = 6.28 cm

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Fig. 10

Length effect on heat transfer enhancement for water/3 cS oil Taylor flow with R = 4 cm

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Fig. 9

Length effect on heat transfer enhancement for water/1 cS oil Taylor flow with R = 4 cm

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Fig. 11

Prandtl number effect on the curved tube with R = 2 cm and L = 9.42 cm

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Fig. 12

Prandtl number effect on the curved tube with R = 2 cm and L = 18.84 cm

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