Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8954099 | International Journal of Heat and Mass Transfer | 2019 | 22 Pages |
Abstract
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 (Bâ¯=â¯0 G, 100 G, 200 G, 300 G), nanoparticle mass fractions (Ïâ¯=â¯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 (Reâ¯=â¯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.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Siyuan Mei, Cong Qi, Tao Luo, Xinfeng Zhai, Yuying Yan,