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 perfor...

In this study, we presented a mathematical model for analyzing the heat source/sink effect on magnetohydrodynamic two-dimensional ferrofluid flow past a cone and a vertical plate in the presence of volume fraction of ferrous nanoparticles. The governing partial differential equations are transformed as ordinary differential equations making use of similarity solutions and solved numerically wit...

The effect of alumina nanoparticles on the heat transfer performance of an oscillating heat pipe (OHP) was investigated experimentally. A binary mixture of ethylene glycol (EG) and deionized water (50/50 by volume) was used as the base fluid for the OHP. Four types of nanoparticles with shapes of platelet, blade, cylinder, and brick were studied, respectively. Experimental results show that the...

Nanoparticles enhanced freezing, termed as nanocryosurgery, is a newly emerging cryosurgical technique which has potential advantage in targeted tumor treatment. However, there are currently no models available to predict the effects of nanoparticles on cell-level biophysical events during cryosurgery. Here, we present a theoretical model through modifying Mazur’s equation and ice nucleation th...

In this work, e-Fe3N nanoparticles and e-Fe3Nbased magnetic fluid were synthesized by chemical reaction of iron carbonyl and ammonia gas. The size of e-Fe3N nanoparticles was tested by TEM and XRD. Stable e-Fe3Nbased magnetic fluid was prepared by controlling the proper ratio of carrier liquid and surfactant. The saturation magnetization of stable e-Fe3N-based magnetic fluid was calculated acco...

In this work, e-Fe3N nanoparticles and e-Fe3Nbased magnetic fluid were synthesized by chemical reaction of iron carbonyl and ammonia gas. The size of e-Fe3N nanoparticles was tested by TEM and XRD. Stable e-Fe3Nbased magnetic fluid was prepared by controlling the proper ratio of carrier liquid and surfactant. The saturation magnetization of stable e-Fe3N-based magnetic fluid was calculated acco...

Morphology control of binary nanoparticles in an electric field was investigated by a computational model. The study revealed rich patterning dynamics and how collective actions of relative permittivity, volume fraction, and particle size can lead to a wide range of superlattice structures from functionally gradient columns to chain networks. These results suggest a significant degree of experi...

Objective(s): This study considered the combination of chitosan nanoparticles with antioxidant-antibacterial fraction extracted from Lactobacillus casei and investigation of possible increasing of antibacterial activity of the fraction in hybrid nanoparticle and the effect of the fraction on the stability of chitosan nanoparticles. Methods: Extra...

In recent decade, the new advanced nanofluids, composed from various particles, have attracted the attention of researchers. This class of nanofluids, which can be prepared by suspending several types (two or more than two) of nanoparticles in base fluid, is termed as hybrid nanofluids. In this work, an experimental investigation on the effects of temperature and concentration of nanoparticles ...

Nanofluids can afford excellent thermal performance and have a major role in energy conservation aspect. In this paper, a sensitivity analysis has been performed by using response surface methodology to calculate the effects of nanoparticles on the entropy generation. For this purpose, the laminar forced convection of Al2O3-water nanofluid flow inside a channel is considered. The total entropy ...