This paper focuses on the convective heat transfer characteristics of Fe3O4
/Water magnetic nanofluids under laminar and turbulent conditions. After
verifying the accuracy of the experimental apparatus, the effects of
magnetic field strength, concentration, Reynolds number and temperature on
the convective heat transfer coefficient have been studied. The convective
heat transfer characteristics of nanofluids under laminar and turbulent flow
conditions were studied in depth, and the influence of each factor on the
heat transfer coefficient was analyzed by orthogonal experimental design
method. Under the laminar flow conditions, the convective heat transfer of
magnetic nanofluids performed best when the Reynolds number was 2000, the
magnetic field strength was 600, the temperature was 30? and the
concentration was 2%. And the convective heat transfer coefficient (h)
increased by 3.96% than the distilled water in the same conditions. In
turbulent state, the convective heat transfer of magnetic nanofluids
performed the best when the Re was 6000, the magnetic field strength was
600, the temperature was 40? and the concentration was 2%. The h increased
by 11.31% than the distilled water in the same Reynolds number and the
magnetic field strength conditions.
Effect of Magnetic Field on the Forced Convective Heat Transfer of Water–Ethylene Glycol-Based Fe3O4 and Fe3O4–MWCNT Nanofluids
