Augmentation of the Heat Transfer Performance of a Sinusoidal Corrugated Enclosure by Employing Hybrid Nanofluid

Abstract

This paper numerically examines laminar natural convection in a sinusoidal corrugated enclosure with a discrete heat source on the bottom wall, filled by pure water, Al 2 O 3 /water nanofluid, and Al 2 O 3 -Cu/water hybrid nanofluid which is a new advanced nanofluid with two kinds of nanoparticle materials. The effects of Rayleigh number (10 3 ≤ Ra ≤ 10 6 ) and water, nanofluid, and hybrid nanofluid (in volume concentration of 0% ≤ ≤ 2%) as the working fluid on temperature fields and heat transfer performance of the enclosure are investigated. The finite volume discretization method is employed to solve the set of governing equations. The results indicate that for all Rayleigh numbers been studied, employing hybrid nanofluid improves the heat transfer rate compared to nanofluid and water, which results in a better cooling performance of the enclosure and lower temperature of the heated surface. The rate of this enhancement is considerably more at higher values of Ra and volume concentrations. Furthermore, by applying the modeling results, two correlations are developed to estimate the average Nusselt number. The results reveal that the modeling data are in very good agreement with the predicted data. The maximum error for nanofluid and hybrid nanofluid was around 11% and 12%, respectively.

An experimental and theoretical investigation on the effects of adding hybrid nanoparticles on heat transfer efficiency and pumping power of an oil-based nanofluid as a coolant fluid

“…As for the density and specific heat capacity, Takabi and Salehi [42] have proposed two correlations to calculate these two factors for hybrid nanofluids as follows:…”

LBM Analysis of Micro-Convection in MHD Nanofluid Flow

“…We assume it pt be an incompressible Newtonian fluid with negligible radiation effect and in laminar and turbulent flow regime. The size of nanoparticles in this study is small enough to be considered as a homogenous flow as reported in the corresponding recent works [22] to [24].…”

Effect of heating rate and plant species on the size and uniformity of silver nanoparticles synthesized using aromatic plant extracts

“…The stability of the mixture was improved by adding alumina, a ceramic material, to the metallic copper nanoparticles. Following their work, Takabi and Salehi (2014) and Takabi and Shokouhmand (2015) showed that the thermal efficiency of this mixture is higher than that of the metallic nanoparticles alone.…”