Generalized Hybrid Nanofluid Model with the Application of Fully Developed Mixed Convection Flow in a Vertical Microchannel*

Xu, Hang; Sun, Qiang

doi:10.1088/0253-6102/71/8/903

Cited by 28 publications

(13 citation statements)

References 31 publications

(48 reference statements)

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“…Note that the expression (5) is restricted to spherical nanoparticles where it does not account for other shapes of nanoparticles. The thermophysical properties of the base fluid, nanofluid and hybrid nanofluid are given in Table 1 , Table 2 , Table 3 and Table 4 , referring to references [ 33 , 34 , 35 , 36 , 37 ].…”

Section: Mathematical Modelmentioning

confidence: 99%

Fully Developed Opposing Mixed Convection Flow in the Inclined Channel Filled with a Hybrid Nanofluid

You

2021

Nanomaterials

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This paper studies the convective heat transfer of a hybrid nanofluid in the inclined channel, whose walls are both heated by the uniform heat flux. The governing ordinary differential equations are made nondimensional and solved analytically, in which explicit distributions of velocity, temperature and pressure are obtained. The effects of flow reversal, wall skin friction and Nusselt number with the hybrid nanofluid depend on the nanoparticle volume fractions and pressure parameters. The obtained results indicate that the nanoparticle volume fractions play a key role in delaying the occurrence of the flow reversal. The hybrid nanofluids hold more delayed range than conventional nanofluids, which is about 2.5 times that of nanofluids. The calculations have been compared with the base fluid, nanofluid and two kinds of hybrid models (type II and type III). The hybrid model of type III is useful and simplified in that it omits the nonlinear terms due to the interaction of different nanoparticle volumetric fractions, with the relative error less than 3%. More results are discussed in the results section below.

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Section: Mathematical Modelmentioning

confidence: 99%

Fully Developed Opposing Mixed Convection Flow in the Inclined Channel Filled with a Hybrid Nanofluid

You

2021

Nanomaterials

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“…www.nature.com/scientificreports/ Table 1. Thermo-physical properties of nanofluid 19 and hybrid nanofluid 40 .…”

Section: Governing Equationsmentioning

confidence: 99%

“…For example, Suresh et al 38 and Momin 39 provided very useful experimental data for understanding the thermal performance of hybrid nanoparticles in various solutions. Xu and Sun 40 investigated that the generalized hybrid nanofluid model for description of base fluids suspended with multiple kinds of solid particles in a vertical microchannel with mixed convection. Their model was then employed by Saqib et al 41 for investigation of natural convection flow of a hybrid nanofluid between two infinite vertical parallel plates.…”

Section: Introductionmentioning

confidence: 99%

Peristaltic channel flow and heat transfer of Carreau magneto hybrid nanofluid in the presence of homogeneous/heterogeneous reactions

Bibi

2020

Sci Rep

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The purpose of present work is to explore the features of homogeneous-heterogeneous reactions in peristalsis flow of Carreau magneto hybrid nanofluid with copper and silver nanoparticles in a symmetric channel. The velocity slip condition and thermal radiation effect is also taken in the simplified model. Thermodynamic optimization aspect is discussed through the entropy generation analysis. The proposed mathematical systems are modified by using a lubrication approach and solved by a homotopy-based package-BVPh 2.0. The impacts of different involved parameters on flow characteristics, thermal characteristics, chemically reactive concentration and entropy generation are scrutinized through analytic results. It reveals that the fluid velocity decreases with the increasing values of the Weissenberg and the Hartman numbers. Characteristics of the Brinkman and the thermal radiation numbers are quite reverse for the heat transfer rate. In addition, entropy generation decreases with thermal radiation and Weissenberg number. The main outcome signifies that hybrid nanofluid is better thermal conductor as compared to the conventional nanofluid. Nomenclature V Velocity of the nanofluid B Magnetic field J Current density P Pressure T Temperature c p Heat capacity Wave length k Thermal conductivity 2a Width of the channel α Concentration of chemical species Ā β Concentration of chemical species B b Amplitude of the peristaltic wave k c Homogeneous reaction coefficient k s Heterogeneous reaction coefficient D A Diffusion coefficient of chemical species A D B Diffusion coefficient of chemical species B c p Specific heat at constant pressure Sc Schmidt number Re Reynold number M Hartman number

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“…Another comparison between the effective viscosities of present work with the existing experimental data of Suresh et al (2012) is presented in Figure 2, very good agreement is found. Clearly, the correlations equation (14) given by Xu and Sun (2019) is meaningful for prediction of nanofluids behaviors.…”

Section: Problem Statementmentioning

confidence: 99%

Free convection of a hybrid nanofluid past a vertical plate embedded in a porous medium with anisotropic permeability

Bibi

Sun

et al. 2020

HFF

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Purpose This study aims to carry out an analysis for flow and heat transfer of a new hybrid nanofluid over a vertical flat surface embedded in a saturated porous medium with anisotropic permeability at high Rayleigh number. Here the hybrid nanofluid is considered as the working fluid, with different kinds of small particles in nanoscale being suspended. Design/methodology/approach The generalized homogenous model is introduced to describe the behaviors of hybrid nanofluid. Within the framework of the boundary layer approximations, the governing equations embodying the conservation equations of total mass, momentum and thermal energy are reduced to a set of fully coupled ordinary differential equations via relevant scaling transformations. A flow stability analysis is performed to examine the behavior of convective heat energy. Accurate solutions are obtained by means of a very efficient homotopy-based package BVPh 2.0. Findings Results show that the linear correlations of physical quantities among the base fluid and its suspended nanoparticles are adequate to give accurate results for simulation of behaviors of hybrid nanofluids. Heat enhancement can be also fulfilled by hybrid nanofluids. A flow stability analysis suggests the heat-related power index m > −1/3 for satisfying the increasing behavior of convective heat energy. Originality/value Free convection of a hybrid nanofluid near a vertical flat surface embedded in a saturated porous medium with anisotropic permeability is investigated for the first time. The simplified hybrid nanofluid model is proposed for describing nanofluid behaviors. The results of this proposed approach agree well with those given by the traditional hybrid nanofluid model and experiment. It is expected that, by using different combinations of various kinds of nanoparticles, the new generation of heat transfer fluids can be fabricated, which possess similar thermal-physical properties as regular nanofluids but with lower cost.

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Generalized Hybrid Nanofluid Model with the Application of Fully Developed Mixed Convection Flow in a Vertical Microchannel*

Cited by 28 publications

References 31 publications

Fully Developed Opposing Mixed Convection Flow in the Inclined Channel Filled with a Hybrid Nanofluid

Fully Developed Opposing Mixed Convection Flow in the Inclined Channel Filled with a Hybrid Nanofluid

Peristaltic channel flow and heat transfer of Carreau magneto hybrid nanofluid in the presence of homogeneous/heterogeneous reactions

Free convection of a hybrid nanofluid past a vertical plate embedded in a porous medium with anisotropic permeability

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