Dynamics of water and iron (II, III) nanoparticles: Impact of alternating magnetic field on heat transfer coefficient
Kanikdeep Flora, Himanshu Patel
Abstract
Unique heat exchanging ability of nanofluids make them suitable for various industrial applications, ranging from heat transfer intensification to nuclear cooling and energy storage to friction reduction including electronics and biomedical applications. In recent years, the research on nanofluids is being focused on three facets: influencing factors, prediction models and applications. The effect of external magnetic field and nanoparticle concentrations on heat transfer characteristics of nanofluids are gaining the interest of many researchers. The work presented in this paper is aimed to highlight the influence of alternating magnetic field on heat transfer coefficient of nanofluid with distilled water as the base fluid having Fe3O4 nanoparticles. An experimental setup is presented which consists of cylindrical test container, temperature sensors, Helmholtz coil and a heater is prepared for thermal analysis of nanofluid in presence and absence of alternating magnetic field. Tests are performed with different concentrations (0.1%, 1% wt.) of Fe3O4 nanoparticles. Outcome in the form of important observations showing the enhancement of heat transfer coefficient of nanofluid in presence of alternating magnetic field are discussed. It is demonstrated with the help of experimental results that the applied magnetic field enhances heat transfer by convection which can be interpreted as increase in Nusselt number of the magnetic nanofluid. The results and conclusive remarks offered in this paper are not only beneficial for various industrial applications wherein change in heat transfer rate plays a vital role, but also provide directions for the peers and beginners for the relevant research for nanofluids.