Effects of magnetic field on thermo-hydraulic performance of Fe3O4-water nanofluids in a corrugated tube

Mei, Siyuan; Qi, Cong; Luo, Tao; Zhai, Xinfeng; Yan, Yuying

Abstract

© 2018 Elsevier Ltd An experimental system is established to investigate the thermo-hydraulic performance of Fe3O4-water nanofluids in a corrugated tube under various magnetic fields. The influences of magnetic induction intensities (B = 0 G, 100 G, 200 G, 300 G), nanoparticle mass fractions (ω = 0.0%, 0.1%, 0.3%, 0.5%), electromagnet arrangement modes (one-side electromagnet and two-side staggered electromagnet), kinds of tubes (smooth tube and corrugated tube), Reynolds numbers (Re = 800–12,000) on flow and heat transfer characteristics are discussed. It is obtained that the augmentation of heat transfer is more sensitive to high nanoparticle mass fraction, high magnetic induction intensity, two-side staggered electromagnet and corrugated tube. A Comprehensive evaluation index is applied to estimate the thermo-hydraulic performance. It can be discovered that the comprehensive evaluation index increases with the increasing Reynolds number at first and then decreases, and the rough surface of corrugated tube delays the appearance of critical Reynolds number.

• Journal Article Type: Article
• Acceptance Date: Aug 18, 2018
• Online Publication Date: Aug 31, 2018
• Publication Date: 2019-01
• Deposit Date: Sep 25, 2018
• Publicly Available Date: Sep 1, 2019
• Journal: International Journal of Heat and Mass Transfer
• Print ISSN: 0017-9310
• Electronic ISSN: 0017-9310
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 128
• Pages: 24-45
• DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2018.08.071
• Keywords: Nanofluids; Magnetic field; Corrugated tube; Heat transfer enhancement
• Public URL: https://nottingham-repository.worktribe.com/output/1131174
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0017931018327479?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: Effects of magnetic field on thermo-hydraulic performance of Fe3O4-water nanofluids in a corrugated tube; Journal Title: International Journal of Heat and Mass Transfer; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.ijheatmasstransfer.2018.08.071; Content Type: article; Copyright: © 2018 Elsevier Ltd. All rights reserved.