The heat transfer and fluid flow characteristics of water/Fe3O4 ferrofluid flow in a tube with V-cut twisted tape turbulator under the magnetic field effect
Publication Name
Journal of Magnetism and Magnetic Materials
Abstract
The magnetic field (MF) effect on the heat transfer of Fe3O4 ferrofluid swirl flow inside a tube with turbulator was investigated under three Re numbers (200, 400, and 600), turbulator pitches (H = 50 mm, 100 mm, and 150 mm), and three scenarios of MF location. The outputs demonstrated that by applying the MF on zone#1 (near the entrance), zone#2 (middle of tube), and zone#3 (near the outlet) improves convective heat transfer coefficient (h) over the tube without MF by 1.1% (or 2.49%), 11.13% (or 14.94%), and 39.42% (or 10.91%), respectively, at Re of 200 (or 600). In consequence, the absorber tube temperature reduces by 0.207% (or 2.23%), 0.058% (or 0.498%), and 0.068% (or 0.293%), respectively, for zones 1, 2, and 3 and at Re = 200 (or 600). In addition, the MF increases the pressure drop over the tube without MF by nearly 16%, 9%, and 4%, for zones 1, 2, and 3, respectively. Furthermore, the intensification of H from 50 mm to 150 mm at Res of 200–600 decreased h by 30.21–19.32% and 28.51–26.91% under zone#1 and zone#2 scenarios, respectively, while enhanced that by 5.52–0.26% for MF applied on zone#3. Furthermore, the highest PEC was obtained as 1.55–2.36 for H values of 50 mm-150 mm when MF is applied on zone#3 and at Re = 200.
Open Access Status
This publication is not available as open access
Volume
586
Article Number
171128
Funding Number
2023DJC084
Funding Sponsor
Hubei Provincial Department of Education