“School of Nano-Sciences”
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| Paper IPM / Nano-Sciences / 16686 |
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| Abstract: | |||||||
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This study utilizes molecular dynamics (MD) simulations to scrutinize the influence of type and volume
fraction of nanoparticle on the density of nanofluids, i.e. silver (as a hydrophilic case) and titanium dioxide
(as a hydrophobic case) water-based nanofluids. Ionic structure of TiO2 distinguishes the solidâliquid
interactions with those in silver-water nanofluid. The thickness of nanolayer is estimated from density
profile formed around the nanoparticle and is included in the density calculation. It is found that the type
of interatomic potential between the nanoparticle and surrounding water can highly affect the thickness
of nanolayer. The hydrophobicity/hydrophilicity of nanoparticle is of great importance in nanolayer density
and its thickness. It is observed that the difference between the traditional binary mixture and the
ternary mixture formula for calculating the density of nanofluid increases by increasing the volume fraction
of nanoparticle. This indicates that the effect of nanolayer gets more considerable at high volume
fractions.
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