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AUGMENTATION OF HEAT TRANSFER IN A MICROTUBE AND A WAVY MICROCHANNEL USING HYBRID NANOFLUID: A NUMERICAL INVESTIGATION
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  • Shikhar Singh,
  • Suvanjan Bhattacharyya,
  • A. R. Paul,
  • M. Sharifpur,
  • Josua Petrus Meyer
Shikhar Singh
Motilal Nehru National Institute of Technology
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Suvanjan Bhattacharyya
Birla Institute of Technology and Science
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A. R. Paul
Motilal Nehru National Institute of Technology
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M. Sharifpur
University of Pretoria
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Josua Petrus Meyer
University of Pretoria
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Abstract

The paper discusses the numerical investigation involving forced convective heat transfer (HT) in the laminar flow regime is carried out for nanofluid (NF) and hybrid nanofluid (HNF) in a microtube and wavy microchannel. Water-based Al2O3 nanofluid and water-based Al2O3-Ag hybrid nanofluid is studied for this purpose. Reynolds Number (Re), temperature, volume fraction, and nanoparticle (NP) size are varied for the analysis at a constant heat transfer rate. Numerical results characterizing the performances of nanofluid and hybrid nanofluid are presented in terms of the local heat transfer coefficient. It is found that with the increase in Reynolds number, volume fraction and temperature, local heat transfer coefficient is increased. Comparison of nanofluid and hybrid nanofluid reveals superior heat transfer property of the later. However, microtube exhibits better heat transfer coefficient than the wavy channel at constant heat flux, length and area.

Peer review status:ACCEPTED

27 Apr 2020Submitted to Mathematical Methods in the Applied Sciences
02 May 2020Submission Checks Completed
02 May 2020Assigned to Editor
02 May 2020Reviewer(s) Assigned
24 May 2020Review(s) Completed, Editorial Evaluation Pending
31 May 2020Editorial Decision: Revise Major
14 Aug 20201st Revision Received
15 Aug 2020Submission Checks Completed
15 Aug 2020Assigned to Editor
15 Aug 2020Reviewer(s) Assigned
15 Aug 2020Review(s) Completed, Editorial Evaluation Pending
15 Aug 2020Editorial Decision: Accept