Thermohydraulics of TiO 2 /Water Nanofluid in a Round Tube with Twisted Tape Inserts
作者： Smith Eiamsa-ard , Kunlanan Kiatkittipong
DOI: 10.1007/S10765-019-2485-5
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摘要: The influence of TiO2 nanoparticles with different volume concentrations in water on heat transfer, friction and thermal performance is explored, finite method used to clarify the transfer a tube inserted twisted tape (TT). In experiment, swirling tubes are generated by TT insert ratio (y/w) 3.0 range Reynolds number between 5400 15,200. mathematical modeling which involves prediction flow behaviors also conducted. concentration nanofluid (ϕ) was varied from 0.07 % 0.21 % volume. results revealed that suspended enhanced conductivity, movement delivered energy exchange. Although an increase led due small particles suspending fluid, could enhance significantly. As compared pure water, presence at ϕ = 0.07 %, ϕ = 0.14 % ϕ = 0.21 % indicated 0.7 %, 1.7 % 3.1 % higher performance, respectively. With number, would be less pronounced high friction. From experimental results, understanding relation effects Nusselt (Nu), factor (f) (η) presented for wide thermophysics application.
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