The attractive force between the nanoparticles can cause them to aggregate. Therefore, nanoparticles have to be dispersed by different methods, in order to utilize their unique material characteristics completely. This study aims to use the self-developed nanofluids synthesis system to produce a Cu-based nanofluid with good suspension stability and particle dispersion. Parameters such as peak c...

A modern concept for solar thermal collectors is based on volumetric absorption of sunlight, where nanoparticles suspended in liquids directly receive the incident radiation. Suspending nanoparticles in traditional fluids can drastically enhance their optical properties and improve thermo-physical performances, thus leading to highly efficient volumetric solar receivers. Several studies have be...

Hybrid nanofluids developed with the fusion or suspension of two more different nanoparticles in a mixture as novel heat transfer fluid are currently interest to researchers due their proven better measured thermal conductivities. Several reviewed articles exist on conductivity hybrid nanofluids, vital property for which rate is directly dependent. This review aims understand current developmen...

thermal and radiative properties. Such work has generated great controversy, although it is arguably accepted today that the presence of nanoparticles rarely leads to useful enhancements in either thermal conductivity or convective heat transfer. On the other hand, there are still examples of unanticipated enhancements to some properties, such as the reported specific heat of molten salt-based ...

This review is about non-Newtonian nanofluid applications for convection in cavities under a magnetic field. Convection an important topic thermal energy system, and diverse exist processes such as drying, chemical processing, electronic cooling, air conditioning, removal of contaminates, power generation many others. Some problems occur symmetrical phenomena, while they can be applicable to ap...

graphene oxide was prepared using modified hummers method. stable ethylene-glycol nanofluids containing graphene oxide nanosheets were provided. nd: yag pulsed laser was applied to prepare reduced nanofluids. experimental results revealed that thermal conductivity of the nanofluids is increased with increasing the concentration of graphene oxide (go) in ethylene glycol. the enhancement ratio of...

A comprehensive model has been proposed to account for the large enhancement of thermal conductivity in nanofluids and its strong temperature dependence, which the classical Maxwellian theory has been unable to explain. The dependence of thermal conductivity on particle size, concentration, and temperature has been taken care of simultaneously in our treatment. While the geometrical effect of a...

An experimental study was conducted to investigate the structural stability of ethylene glycol-based titanium dioxide nanoparticle suspensions (nanofluids) prepared by two-step method. The effects of particle concentration, fluid temperature, shear rate and shear duration were examined. Particle size and thermal conductivity measurements in quiescent state indicated the existence of aggregates ...