A numerical simulation model for laminar flow of nanofluids in a pipe with constant heat flux on the wall was built to study the effect of the Reynolds number on convective heat transfer and pressure loss. The investigation was performed for hybrid nanofluids consisting of CuO-Cu nanoparticles and compared with CuO and Cu in which the nanoparticles have a spherical shape with size 50, 50, 50nm ...

In this study, the steady forced convection flow and heat transfer due to an impermeable stretching surface in a porous medium saturated with a nanofluid are investigated numerically. The Brinkman-Forchheimer model is used for the momentum equations (porous medium), whereas, Bongiorno's model is used for the nanofluid. Uniform temperature and nanofluid volume fraction are assumed at the surface...

Pool boiling heat transfer characteristics of Al2O3 -water nanofluids is studied experimentally using a NiCr test wire of 36 standard wire guage diameter. The experimental work mainly concentrated on (1) change of critical heat flux with different volume concentrations of nanofluid and (2) flow visualization of pool boiling using a fixed concentration of nanofluid at different heat flux values....

In this Letter, dynamic wetting of water nano-droplets containing non-surfactant gold nanoparticles on a gold substrate is examined via molecular dynamics simulations. The results show that the addition of non-surfactant nanoparticles hinders the nano-second droplet wetting process, attributed to the increases in both surface tension of the nanofluid and friction between nanofluid and substrate...

Abstract Hybrid nanofluid, which is a combination of Propylene Glycol (PG) – Water (H 2 O) admixture and paraffin wax sand, may be utilized as standby for PG blend in solar thermal framework. Objective this article the exploration dissipative flow propylene-glycol water mixture based hybrid nanofluid by sphere with chemical reaction heat source parameters. MATLAB in-built solver bvp4c to exhibi...

Abstract The actual lifetime of a transformer is between 30-50 years, while foundation can be in service for 100 years. aim this research to get the exact remaining transformers and suggest method improve it. Hybrid nanoparticles are used thermal properties dielectric strength oil. Titanium oxide (TiO 2 ), Iron (Fe 3 O 4 Graphene specific concentration prepare hybrid nanoparticles. Energy Dispe...

A new type of single-phase stand-alone induction generator using a three-phase induction machine and a single-phase voltage-source PWM inverter is introduced. The generator scheme is capable of producing constant load frequency with a very well regulated output voltage. A small lead acid battery and a single-phase full diode-bridge rectifier are used to feed the inverter. The inverter feeds one...

Abstract In this paper, convective heat transfer of Fe 3 O 4 –carbon nanotubes (CNTs) hybrid nanofluid was studied in a horizontal small circular tube under influence annular magnets. The pipe has an inner diameter mm and length 1.2 m. Heat characteristics the –water were examined for many parameters, such as nanoparticle volume fraction range 0.4–1.2% Reynolds number 476–996. order to increase...

Heat transfer phenomena are used in a variety of industries, including chemical devices, shipbuilding, power plants, electronic and medicinal plants. Propylene glycol, engine oil, water, ethylene glycol common single-phase heat liquids process industries thermal Therefore, the authors interested investigating magnetohydrodynamic flow water-based hybrid nanofluid containing ferrous graphene oxid...