Convective heat transfer performance of hybrid nanofluid in a horizontal pipe considering nanoparticles shapes effect

Abstract

In this paper, the problem of steady forced convection heat transfer and fluid flow characteristics of a hybrid nanofluid flowing through an isothermally heated horizontal tube considering various nanoparticle shapes has been investigated numerically. The three dimensionless cylindrical coordinate equations are discretized using the finite volume method and solved via a FORTRAN program. A numerical parametric investigation is carried out for a tube filled with regular water, (TiO 2 /water) nanofluid and (Ag-TiO 2 /water) hybrid nanofluid. Four different types of nanoparticle shapes are considered in this study, spherical, cylindrical, platelets and blades, with different volume fractions ranging from 0 to 8% using water as a base liquid. The influence of nanoparticle shape, nanoparticle concentration and Reynolds number on the local Nusselt number and the friction factor is essentially examined. The results showed that the friction factor of both nanofluid and hybrid nanofluid flow was increased as the nanoparticle volume fraction increased for all kinds of nanoparticle shapes, whereas it decreased as the Reynolds number increased. Nusselt number increased with increase in the nanoparticle concentration and Reynolds number. The highest heat transfer rate was acquired for the maximum nanoparticle volume concentration by using blade nanoparticle shape followed by platelet shape, cylindrical shape and lastly the sphere shape. It was found that the maximum values of the friction factor were registered for platelet-shape nanoparticles.

Entropy analysis of nanofluid magnetohydrodynamic convection flow past an inclined surface: A numerical review

“…They observed that in the presence of gold nanoparticles, the effect of thermal radiation on blood flow enhances the temperature, which aids in the drug delivery process to kill cancer cells. Benkhedda et al 8 presented the forced convection flow field dynamics of the hybrid nanofluid across an adiabatically warmed horizontal tube using the finite volume method. They recorded significant skin friction values for platelet‐shaped nanoparticles.…”

Advancement of Non-Newtonian Fluid with Hybrid Nanoparticles in a Convective Channel and Prabhakar’s Fractional Derivative—Analytical Solution

“…Montazer et al [11] described the development of the original relationships and the heat transfer of the stormy nanoparticles. Benkhedda et al [12] defined the horizontal tube considering the forms of nanoparticles, resulting in convective heat transfer presentation of the hybrid nanoparticles. Bhattad et al [13] conferred the plate in the heat exchanger of hydrothermal presentation of dissimilar alumina hybrid nanoparticles.…”

Investigation of Overlapped Twisted Tapes Inserted in a Double-Pipe Heat Exchanger Using Two-Phase Nanofluid

“…Applying additive nanoparticles to the base fluid to enhance the thermophysical properties of the working fluid has also been considered as an effective technique to modify heat transfer [ 12 , 13 ]. The hybrid nanofluids such as Ag–MgO–water [ 14 , 15 ], Ag–TiO 2 [ 16 ], Cu–Al 2 O 3 [ 16 , 17 ], and MgO–MWCNTs/EG [ 18 ] as well as using of nonencapsulated phase change material suspension [ 19 ] are also promising for enhancement of heat transfer. On the other hand, combining different techniques to promote the thermohydraulic performance of thermal engineering systems as much as possible has been paid a lot of attention in recent years [ 20 , 21 ].…”