International Scientific Journal


Experimental study of convective heat transfer with Fe3O4-H2O (1 vol%) nanofluids was examined when the nanofluids flowed through a gridded micro-channel under a perpendicularly oriented magnetic field of 0-700 G strength. The results show that, compared to deionized water, nanofluids reduces chip temperature by 2.11°C and increases the convective heat transfer coefficient by 30.43% when no magnetic field is present. Under magnetic field conditions, the chip temperature was maximally reduced by 3.2°C, while the convective heat transfer coefficient is improved up to 65% in comparison to deionized water. With increasing magnetic field strength, nanofluids pressure drop and flow resistance showed an overall decreasing trend, and the pressure drop at 500 G and 700 G were reduced by 19.3% and 14.51%, respectively, compared to that at 0 G. In terms of overall performance, improved heat transfer in the presence of a magnetic field outper-forms heat transfer in the absence of a magnetic field. The intensive heat transfer factor of nanofluids under magnetic field conditions is greater than one when the Reynolds number exceeds 400. The best overall performance and the highest intensive heat transfer factor are observed at a magnetic field strength of 300 G.
PAPER REVISED: 2022-08-30
PAPER ACCEPTED: 2022-09-06
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 1, PAGES [289 - 297]
  1. Selvakumar, P., et al., Investigations of effect of radial flow impeller type swirl generator fitted in an electronic heat sink and /water nanofluids on heat transfer enhancement, Chemical Engineering and Processing Process Intensification, 72(2013), pp.103-112
  2. Ho, C. J., et al., Efficacy of divergent minichannels on cooling performance of heat sinks with water-based MEPCM suspensions, International Journal of Thermal Sciences, 130(2018), pp.333-346
  3. Behzad, F., et al., Effect of nanoparticles size on thermal performance of nanofluids in a trapezoidal microchannel- heat-sink, International Communications in Heat and Mass Transfer, 45(2013), pp.155-161
  4. Ho, C. J., et al., Comparative study on thermal performance of MEPCM suspensions in parallel and divergent minichannel heat sinks, International Communications in Heat and Mass Transfer, 94(2018), pp.96-105
  5. Zhai, Y. L., et al., Heat transfer enhancement of nano-fluids flowing through a micro heat sink with complex structure, International Communications in Heat and Mass Transfer, 66(2015), pp.158-166
  6. Sohel, M. R. , et al., An experimental investigation of heat transfer enhancement of a minichannel heat sink using nanofluids, International Journal of Heat and Mass Transfer, 74(2014), pp.164-172
  7. Solangi, K. H, et al., A comprehensive review of thermo-physical properties and convective heat transfer to nanofluids, Energy, 89(2015), pp.1065-1086
  8. Bhogare, R. A, and Kothawale, B. S., Performance investigation of Automobile Radiator operated with based nanofluids, IOSR Journal of Mechanical and Civil Engineering, 11(2014), 3, pp. 23-30
  9. Seyf, H. R, and Feizbakhshi, M., Computational analysis of nanofluids effects on convective heat transfer enhancement of micro-pin-fin heat sinks, International Journal of Thermal Sciences, 58(2012), pp.168-179
  10. Mital, M., Analytical analysis of heat transfer and pumping power of laminar nanofluids developing flow in microchannels, Applied Thermal Engineering, 50(2013),1, pp.429-436
  11. Sakanova, A, et al., Performance improvements of microchannel heat sink using wavy channel and nanofluids, International Journal of Heat and Mass Transfer, 89( 2015) pp. 59-74
  12. Sundar, L. S., et al., Experimental investigation of forced convection heat transfer and friction factor in a tube with magnetic nanofluids, Experimental Thermal and Fluid Science. 37 (2012) , pp.65-71
  13. Sakanova, A., et al., Optimization and comparison of double-layer and double-side micro-channel heat sinks with nanofluids for power electronics cooling, Applied Thermal Engineering, 65(2014),1-2, pp.124-134
  14. Li, C., et al., Study on the flow and heat dissipation of water-based alumina nanofluids in microchannels, Case Studies in Thermal Engineering, 22(2020) pp.100746
  15. Ghofrani, A., et al., Experimental investigation on laminar forced convection heat transfer of ferrofluids under an alternating magnetic field, Experimental Thermal and Fluid Science, 49(2013), pp.193-200
  16. Goharkhah, M., et al., Convective heat transfer characteristics of magnetite nanofluids under the influence of constant and alternating magnetic field, Powder Technology, 274 (2015), pp. 258-267
  17. Sha, L., et al., Experimental investigation on the convective heat transfer of /water nanofluids under constant magnetic field, Applied Thermal Engineering, 113(2017), pp. 566-574
  18. Parekh, K. and Lee, H. S., Magnetic field induced enhancement in thermal conductivity of magnetite nanofluids, Journal of Applied Physics, 107 (2010) pp.09A310-09A310

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence