TY - JOUR ID - 31175 TI - Rheological Behavior of Water-Ethylene Glycol Based Graphene Oxide Nanofluids JO - Iranian Journal of Chemistry and Chemical Engineering JA - IJCCE LA - en SN - 1021-9986 AU - Izadkhah, Mir-Shahabeddin AU - Erfan-Niya, Hamid AU - Moradkhani, Hamed AD - Faculty of Chemical and Petroleum Engineering, University of Tabriz, P.O. Box 5166616471 Tabriz, I.R. IRAN Y1 - 2018 PY - 2018 VL - 37 IS - 5 SP - 177 EP - 187 KW - nanofluid KW - Graphene oxide KW - Rheological properties KW - Non-equilibrium molecular dynamics simulation KW - Shear rate DO - 10.30492/ijcce.2018.31175 N2 - Traditionally water-ethylene glycol mixture based nanofluids are used in cold regions as a coolant in the car radiators. In the present study, the rheological properties of water-ethylene glycol based graphene oxide nanofluid are studied using Non-Equilibrium Molecular Dynamics (NEMD) method at different temperatures, volume concentrations, and shear rates. NEMD simulations are performed with considering 75/25, 60/40, and 40/60 ratios of water/ethylene glycol as the base fluids at volume concentrations of 3%, 4%, and 5% graphene oxide nanosheets. The results, which demonstrated good agreement with experimental data, show that the viscosity and density of base fluids significantly decrease with temperature and increases with ethylene glycol volume fraction. Also, the viscosity and density of nanofluids depends directly on the volume concentrations of nanoparticles and decreases with increasing temperature. For example, at 289.85 K, the viscosity of water (75%)-ethylene glycol (25%) based nanofluids containing 3%, 4% and 5% volume concentrations of nanoparticles increased by 33%, 43%, and 56%, respectively. Similarly, the density of the same nanofluids increased by 1%, 1.7 %, and 2.2%, respectively. Moreover, the theoretical models confirm the obtained results. According to the shear rate analysis, the water-ethylene glycol based graphene oxide nanofluid behaves as a non-Newtonian fluid. UR - https://ijcce.ac.ir/article_31175.html L1 - https://ijcce.ac.ir/article_31175_6e8adefa8b23e38a61ad243457d7af3f.pdf ER -