Nanofluids: A Review on Current Scenario and Future prospective

Narayanan, Mysore; Rakesh, S. G.

doi:10.1088/1757-899x/377/1/012084

Cited by 15 publications

(10 citation statements)

References 16 publications

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“…After presenting the progress of studies on nanofluid thermophysical characterization, they identified some possible opportunities for future research that can bridge the gap between in-lab research and commercialization of nanofluids as this nanofluids are receiving large attention due to their potential usage. Reference [6], who reviewed the current scenario and future prospective of nanofluids, who also supported the conclusion of [5], ended with that the study of nanofluids has been materialized as a new field of scientific interest and innovative application. Reference [3] investigated nanofluid characteristics concerning thermal behavior in a plain tube, which showed significant enhancement rate in heat transfer with increase in nanoparticles diameter and volume concentration.…”

Section: Nanoenhanced Heat Transfermentioning

confidence: 88%

Applications of Compound Nanotechnology and Twisted Inserts for Enhanced Heat Transfer

Al-Kayiem¹,

Kassim²,

Taher³

2020

Inverse Heat Conduction and Heat Exchangers

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Nanoadditives are a type of heat transfer enhancement techniques adopted in heat exchangers to improve the performance of industrial plants through improvement of the thermal properties of base fluids. Recently, various types of inserts with nanofluids are adopted to enhance the thermal performance of double pipe heat exchangers. In the current article, TiO 2 /water nanofluid with multiple twisted tape inserts was investigated as a hybrid enhancement technique of heat transfer in straight pipes. The investigations were carried out experimentally and numerically at Reynolds numbers varied from 5000 to 20,000. Using nanofluid with 0.1% TiO 2 nanoparticles volume fraction demonstrated enhanced heat transfer with slight increase in pressure drop. Results are showing a maximum increase of 110.8% in Nusselt number in a tube fitted with quintuple twisted tape inserts with 25.2% increase in the pressure drop. However, as the article is representing a part of specified book on heat exchangers, the literature has been extended to provide sufficient background to the reader on the use of nanotech, twisted inserts, and hybrid of compound nanofluids and inserts to enhance heat transfer processes.

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Section: Nanoenhanced Heat Transfermentioning

confidence: 88%

Applications of Compound Nanotechnology and Twisted Inserts for Enhanced Heat Transfer

Al-Kayiem¹,

Kassim²,

Taher³

2020

Inverse Heat Conduction and Heat Exchangers

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“…However, thermal conductivity and specific heat capacity at different levels of concentration of nanoparticles, nanoparticles’ size, and temperature are some of the thermal properties. The concentration of nanoparticles, pressure drop, friction factor, nanoparticles radius are also some of the outlined characteristics of nanofluids as pointed out by Mohamoud Jama 16 , Narayanan and Rakesh 17 , Lin and Yang 18 . Intrinsic magnetic related properties of magnetite vary as to its diameter changes (i.e.…”

Section: Introductionmentioning

confidence: 94%

Significance of nanoparticle’s radius, heat flux due to concentration gradient, and mass flux due to temperature gradient: The case of Water conveying copper nanoparticles

Shah

Animasaun

Chung

et al. 2021

Sci Rep

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The performance of copper selenide and effectiveness of chemical catalytic reactors are dependent on an inclined magnetic field, the nature of the chemical reaction, introduction of space heat source, changes in both distributions of temperature and concentration of nanofluids. This report presents the significance of increasing radius of nanoparticles, energy flux due to the concentration gradient, and mass flux due to the temperature gradient in the dynamics of the fluid subject to inclined magnetic strength is presented. The non-dimensionalization and parameterization of the dimensional governing equation were obtained by introducing suitable similarity variables. Thereafter, the numerical solutions were obtained through shooting techniques together with 4th order Runge–Kutta Scheme and MATLAB in-built package. It was concluded that at all the levels of energy flux due to concentration gradient, reduction in the viscosity of water-based nanofluid due to a higher radius of copper nanoparticles causes an enhancement of the velocity. The emergence of both energy flux and mass flux due to gradients in concentration and temperature affect the distribution of temperature and concentration at the free stream.

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“…45 Using the Standard k − turbulent model, the equations for turbulent kinetic energy (k) and dissipation rate ( ) are given by Equation (8a) and (8b). 46 k , are the turbulent Prandtl number for k and , respectively, whereas G k represents the rate of production of turbulent kinetic energy as given in Equation (9). 47 Where S = √ 2S S is the modulus of the rate of strain tensor.…”

Section: Single-phase Modelmentioning

confidence: 99%

“…A number of authors have investigated the heat transfer performance of carbon nanotubes . Among these, Estellé et al experimentally studied the thermal performance of multi‐walled carbon nanotube nanofluids (MWCNT/H 2 O and MWCNT/H 2 O‐EG) flowing through a coaxial heat exchanger tube in laminar flow regime.…”

Section: Introductionmentioning

confidence: 99%

“…7,8 A number of authors have investigated the heat transfer performance of carbon nanotubes. [8][9][10] Among these, Estellé et al 11 experimentally studied the thermal performance of multi-walled carbon nanotube nanofluids (MWCNT/ H 2 O and MWCNT/H 2 O-EG) flowing through a coaxial heat exchanger tube in laminar flow regime. The results obtained show that the heat transfer performance increases as the concentration of the carbon nanotube increases.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical investigation of thermal performance of single‐walled carbon nanotube nanofluid under turbulent flow conditions

Fadodun

Amosun

Salau

et al. 2019

Engineering Reports

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In this paper, a numerical study is performed to investigate the effect of Reynolds number and nanoparticle concentration on the thermal performance of single‐walled carbon nanotubes (SWCNTs) nanofluids flowing through a straight pipe with constant heat flux in a turbulent flow regime. The governing equations (continuity, momentum, energy, rate of turbulent production, and rate of turbulent dissipation) are solved using a computational fluid dynamic approach (ie, finite volume method). In the sensitivity analysis, the Reynolds number is varied between (10 000‐200 000) and nanoparticle concentration between (0%‐0.25%). The simulation results show that convective heat transfer (average Nusselt number) increases by 7.48% while the pressure drop and pumping power increase by 119% and 199%, respectively. In addition, at low Reynolds number (104), increase in nanoparticle concentration (0%‐0.25%) decreases entropy production rate by 16.95%. However, at higher Reynolds number (2*105), the entropy production rate increases by 149.77%. Furthermore, other results such as entropy generation number, Bejan number, second thermodynamic law efficiency, and thermal performance factor, which combine the first and second law of thermodynamics, are presented as functions of Reynolds number and nanoparticle's concentration. The overall result shows that SWCNT nanofluid will only be beneficial at low Reynolds number of (10 000‐50 000).

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Nanofluids: A Review on Current Scenario and Future prospective

Cited by 15 publications

References 16 publications

Applications of Compound Nanotechnology and Twisted Inserts for Enhanced Heat Transfer

Applications of Compound Nanotechnology and Twisted Inserts for Enhanced Heat Transfer

Significance of nanoparticle’s radius, heat flux due to concentration gradient, and mass flux due to temperature gradient: The case of Water conveying copper nanoparticles

Numerical investigation of thermal performance of single‐walled carbon nanotube nanofluid under turbulent flow conditions

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