Entropy Generation of Graphene Nanoplatelets in Micro and Mini Channels: Nanofluid Flow in Automotive Cooling Applications
نویسندگان
چکیده
The present study examines the entropy generation of graphene nanoplatelet (GnP) suspended in different basefluids, theoretically. GnP water (W), ethylene glycol (EG) and glycol- (EGW, 1:1) was examined under laminar flow state a unit length mini micro-channel 3mm 0.05mm diameter. coefficient conductivity (Ck) viscosity (C?) nanofluid were determined from experimental analysis their order magnitude established for micro-channels. Entropy by fluid friction (?gen, ff) channels containing EG higher than with W EGW 75.6% 79.9%, respectively. Thermal irreversibility th) lower by132.9% 58.2% compared to EGW. Sgen,th all fluids decreased increased solid volume fraction mini-channels, while, ?gen,ff increase Total tot) 64.8% EGW, respectively micro-channel, whereas ?gen, tot 123.7% 38.4% As ratio decreased, highlighting positive influence thermal properties nanofluid. A Bejan number (Bew), 36.8% 358.9% observed Bew 3.8% 13.8% when nanofluids channel.
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ژورنال
عنوان ژورنال: International Journal of Heat and Technology
سال: 2022
ISSN: ['0392-8764']
DOI: https://doi.org/10.18280/ijht.400408