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  • Natural convection of nanofluids around a hotstrip [Elektronski vir]
    Ravnik, Jure ; Škerget, Leopold
    In this paper we analyse flow and heat transfer characteristics of nanofluids in natural convection flows in closed cavities. We consider natural convection around a hotstrip located in two positions ... within a cavity. Simulations were performed for Rayleigh number values ranging from 103 to 105. Performance of three types of water based nanofluids was compared with pure water. Stable suspensions of Cu, Al2O3 and TiO2 solid nanoparticles in water were considered for different volume fractions ranging up to 20%. We present and compare heat flux for all cases and analyse heat transfer enhancement attributed to nanofluids in terms of their enhanced thermal properties and changed flow characteristics. Results show that, using nanofluids, the largest heat transfer enhancements can be achieved in diffusion dominated flows as well as that nanofluids increase the three-dimensional character of the flow field.
    Vrsta gradiva - prispevek na konferenci
    Leto - 2010
    Jezik - angleški
    COBISS.SI-ID - 14303766