A survey on experimental and numerical studies of convection heat transfer of nanofluids inside closed conduits

Safaei, Mohammad Reza; Shadloo, Mostafa Safdari; Goodarzi, Mohammad Shahab; Hadjadj, A.; Goshayeshi, Hamid Reza; Afrand, Masoud; Kazi, S.N.

doi:10.1177/1687814016673569

Cited by 105 publications

(29 citation statements)

References 123 publications

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“…On the other hand, increasing research effort has been devoted to study the mechanism of nanofluids owing to their great potentials in thermal engineering [12][13][14]. Many experiments were carried out to investigate convective flow and heat transfer features of various nanofluids [15][16][17]. Among those studies, Wen and Ding [15] experimentally confirmed that the heat transfer enhancement is prominent when pure heat transfer fluids are replaced by nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Nanofluid flow and heat transfer in a microchannel with interfacial electrokinetic effects

Zhao

Tao³

2018

International Journal of Heat and Mass Transfer

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The behaviour of microchannel flow of a nanofluid between two parallel flat plates in the presence of the electrical double layer (EDL) is investigated in this paper. The problem is formulated based on the Buongiorno nanofluid model with the electrical body force due to the EDL being considered in the momentum equation. As one of the highlights of the present investigation, the unphysical assumption introduced in previous studies often leading to the discontinuities of flow field that the electrostatic potential in the middle of the channel has to be equal to zero is eliminated. In addition, the inappropriate assumption that the pressure constant is treated as a known condition is also rectified. The new model is developed with the governing equations being reduced by a set of dimensionless quantities to a set of coupled ordinary differential equations. Based on the analytical approximations, the influences of various physical parameters on the flow field and temperature field, and the important physical quantities of practical interests are analysed and discussed in detail.

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Section: Introductionmentioning

confidence: 99%

Nanofluid flow and heat transfer in a microchannel with interfacial electrokinetic effects

Zhao

Tao³

2018

International Journal of Heat and Mass Transfer

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“…Recently, Sadeghi et al [7] investigated porosity effects for the two-phase flow. Significant developments for two-multiphase flows are contained in [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Study of Two-Phase Newtonian Nanofluid Flow Hybrid with Hafnium Particles under the Effects of Slip

et al. 2020

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This paper investigates the role of slip in a two-phase flow of Newtonian fluid. The nano-size Hafnium particles are used in the base fluid. The fluid under consideration is studied for two cases namely (i) fluid phase (ii) phase of particles. Both cases are examined for three types of geometries. The governing equations are simplified in nondimensional form for each phase along with boundary conditions. The resulting equations have been analytically solved to get exact solutions for both fluid and particle phases. Different features of significant physical factors are discussed graphically. The flow patterns have been examined through streamlines.

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“…In order to solve this problem, nanofluids, composed of suspended particles with nanometer dimensions and a base fluid, are suggested [1,2]. Nanofluids have modified thermal features compared with the base liquid owing to the existence of solid nano-sized particles [3][4][5][6][7][8] Thus, in order to increase the heat transfer coefficient, nanofluids' utilization in micro and macro channels has been popular. On the other hand, some effects, like viscous dissipation, that can be neglected in macro-scale problems are of particular importance in smaller scales [9].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Forced Convective Heat Transfer and Performance Evaluation Criterion of Al2O3/Water Nanofluid Flow inside an Axisymmetric Microchannel

et al. 2020

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Al2O3/water nanofluid conjugate heat transfer inside a microchannel is studied numerically. The fluid flow is laminar and a constant heat flux is applied to the axisymmetric microchannel’s outer wall, and the two ends of the microchannel’s wall are considered adiabatic. The problem is inherently three-dimensional, however, in order to reduce the computational cost of the solution, it is rational to consider only a half portion of the axisymmetric microchannel and the domain is revolved through its axis. Hence. the problem is reduced to a two-dimensional domain, leading to less computational grid. At the centerline (r = 0), as the flow is axisymmetric, there is no radial gradient (∂u/∂r = 0, v = 0, ∂T/∂r = 0). The effects of four Reynolds numbers of 500, 1000, 1500, and 2000; particle volume fractions of 0% (pure water), 2%, 4%, and 6%; and nanoparticles diameters in the range of 10 nm, 30 nm, 50 nm, and 70 nm on forced convective heat transfer as well as performance evaluation criterion are studied. The parameter of performance evaluation criterion provides valuable information related to heat transfer augmentation together with pressure losses and pumping power needed in a system. One goal of the study is to address the expense of increased pressure loss for the increment of the heat transfer coefficient. Furthermore, it is shown that, despite the macro-scale problem, in microchannels, the viscous dissipation effect cannot be ignored and is like an energy source in the fluid, affecting temperature distribution as well as the heat transfer coefficient. In fact, it is explained that, in the micro-scale, an increase in inlet velocity leads to more viscous dissipation rates and, as the friction between the wall and fluid is considerable, the temperature of the wall grows more intensely compared with the bulk temperature of the fluid. Consequently, in microchannels, the thermal behavior of the fluid would be totally different from that of the macro-scale.

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A survey on experimental and numerical studies of convection heat transfer of nanofluids inside closed conduits

Cited by 105 publications

References 123 publications

Nanofluid flow and heat transfer in a microchannel with interfacial electrokinetic effects

Nanofluid flow and heat transfer in a microchannel with interfacial electrokinetic effects

Study of Two-Phase Newtonian Nanofluid Flow Hybrid with Hafnium Particles under the Effects of Slip

Numerical Investigation of Forced Convective Heat Transfer and Performance Evaluation Criterion of Al2O3/Water Nanofluid Flow inside an Axisymmetric Microchannel

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