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study on forced convective heat transfer of non-newtonian nanofluids
Author(s): 
Pages: 20-26
Year: Issue:  1
Journal: Journal of Thermal Science

Keyword:  nanofluids forced convective heat transfer mathematical modelling non-Newtonian fluid;
Abstract: <正> This paper is concerned with the forced convective heat transfer of dilute liquid suspensions of nanoparticles(nanofluids) flowing through a straight pipe under laminar conditions. Stable nanofluids are formulated by usingthe high shear mixing and ultrasonication methods. They are then characterised for their size, surface charge,thermal and theological properties and tested for their convective heat transfer behaviour. Mathematical modellingis performed to simulate the convective heat transfer of nanofluids using a single phase flow model and consideringnanofluids as both Newtonian and non-Newtonian fluid. Both experiments and mathematical modellingshow that nanofluids can substantially enhance the convective heat transfer. Analyses of the results suggest thatthe non-Newtonian character of nanofluids influences the overall enhancement, especially for nanofluids with anobvious non-Newtonian character.
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