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research-article

Numerical Heat Transfer and Entropy Analysis on Liquid Slip Flows through Parallel-Plate Microchannels

[+] Author and Article Information
Mostafa Shojaeian

Mechatronics Engineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, Turkey
shojaeian@sabanciuniv.edu

Masoumeh Nedaei

Mechatronics Engineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, Turkey
mnedaei@sabanciuniv.edu

Mehmet Yildiz

Material Science and Engineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, Turkey
meyildiz@sabanciuniv.edu

Ali Kosar

Mechatronics Engineering Program, Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, Turkey
kosara@sabanciuniv.edu

1Corresponding author.

ASME doi:10.1115/1.4037199 History: Received August 30, 2016; Revised June 18, 2017

Abstract

In this study, two-dimensional numerical simulations of liquid slip flows in parallel-plate microchannels have been performed to obtain heat transfer characteristics and entropy generation rate under asymmetric heating conditions. Heat transfer analysis has been conducted along with Second-Law Analysis through utilizing temperature-dependent thermophysical properties. The results indicate that temperature dependent thermophysical properties have a positive effect on convective heat transfer and entropy generation. Nusselt numbers of the upper and lower plates and global entropy generation rates are significantly affected by slip parameter and heat flux ratio. It is shown that Nusselt number of the lower plate may have very large but finite values at a specific heat flux ratio. This finding resembles to analytical solutions, where singularities leading to an infinite Nusselt number exist.

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