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 ...

The present work deals with the laminar natural convection in a square cavity with differentially heated side walls subjected to constant temperatures and filled with homogenous 0,4 wt. % aqueous solution of carboxymethyl cellulose (CMC) based Au, Al2O3, Cu and TiO2 nanofluids obeying the Power law rheological model. The governing differential equations have been solved by the standard finite v...

Convection heat transfer is widely used in many industrial and cooling systems. The convection can be enhanced passively by adding metal nanoparticles the water that have been adequately consumed. Small solid metals or of oxides floating base liquid increase efficiency thermal transmission system. Commercial CFD code FLUENT to simulate water-based nanofluids considered a single-phase fluid. eff...

This study investigates the nanofluid flow towards a shrinking cylinder consisting of Al2O3 nanoparticles. Here, is subjected to prescribed surface heat flux. The similarity variables are employed gain equations. These equations solved via bvp4c solver. From findings, unique solution found for strength ???1. Meanwhile, dual solutions observed when ?c<?<?1. Furthermore, friction factor Rex...

This paper investigates the enhancement of heat transfer coefficient and Nusselt number of a nanofluid containing nanoparticles (γ-AL2O3) with a particle size of 20 nm and volume fraction of 0.1%-0.3% (V/V). Effects of temperature and concentration of nanoparticles on Nusselt number changes and heat transfer coefficient in a double pipe heat exchanger with counter turbulent flow are investigate...

in this paper, mixed convection of al2o3-eg-water nanofluid in a square lid-driven enclosure is investigated numerically. the focus of this study is on the effects of variable thermophysical properties of the nanofluid on the heat transfer characteristics. the top moving and the bottom stationary horizontal walls are insulated, while the vertical walls are kept at different constant temperature...

This study reports experimental and Computational Fluid Dynamics (CFD) investigations of the laminar convective heat transfer coefficient of Al2O3/water nanofluids in a circular tube under uniform and constant heat flux on the wall. Three different models including a constant physical properties single-phase (CP-SP) model, a variable physical properties single-phase (VP-SP) model and a discrete...

The field synergy study is carried out using three oxide nanofluids impinging circular jet on the horizontal disc to analyse synergetic interaction of cooling processes between temperature and flows fields. h eat transfer effect o f nanofluid examined by rising Reynolds number nanoparticle concentration depending number. For impinged process, scale flow speed decayed with increase Hence, it con...

Nanofluids have a solid-fluid interface that affects their thermal properties during heat transfer processes. In this study, nanolayer and interfacial resistance (TIR) at the are discussed to determine role in enhancement of conductivity Al2O3-CO2 nanofluid. The current work focuses on molecular dynamics simulations study TIR formed CO2 molecules around Al2O3 nanoparticle (np) for supercritical...

in this study, thermal performance of a cylindrical heat pipe is investigated numerically. three different types of water based nanofluids, namely (al2o3+water), (diamond+water) and (multi-wall carbon nano tube (mwcnt) +water) have been used. the influence of using the simple nanofluids and mwcnt nanofluid on the heat pipe characteristics such as liquid velocity, pressure profile, temperature p...