Experimental investigation of convection heat transfer in the transition flow regime of aluminium oxide-water nanofluids in a rectangular channel

Osman, Sohaib; Sharifpur, Mohsen; Meyer, Josua P.

doi:10.1016/j.ijheatmasstransfer.2018.12.169

Cited by 74 publications

(29 citation statements)

References 42 publications

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“…Shell and tube heat exchanger provides higher performance with an increase in concentration and higher compared to parallel and counter flow heat exchangers. Sohaib Osman et al 2019 (11) experimentally studied heat transfer enhancement by comparing the laminar, turbulent and transition flow regime in the rectangular channel with one step method nanofluid preparation. In this work, the results he attained that the transition flow in the rectangular channel had 54% heat transfer enhancement compared to the turbulent flow with 11% at 1% concentration with the Reynolds number range of 200-7000.…”

Section: Resultsmentioning

confidence: 99%

“…Zeta potential, spectral absorbency and visual inspection are used for the stability investigation of the nanoparticle in the base fluid (12). Osman et al 2019 (11) prepared the alumina nanoparticle and he had used ultrasonicator (Qsonice Q700) with an amplitude of 60% for 20 minutes at 3 s pulse on and 1 s pulse off intervals to enhance the stability of the nanofluid. By measuring the viscosity at 25 C over 24 hour and visual inspection of one week, he found no agglomeration during his inspection.…”

Section: Stability Rheological and Agglomeration Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

A Recent Examination on the Performance of Heat Exchangers using Al2O3 Nanofluid with Its Thermo Physical Properties

Armstrong¹,

Sivasubramanian²,

Selvapalam³

2019

IJEAT

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Heat exchangers are the most significant equipment used in the industrial sites for exchanging the useful energy for many applications. It may be used either for cooling or heating but in the industrial scenario, it mostly used for cooling. In the current research development, the nanoparticles of different high thermal conductivity metals have been prepared and introduced in the low thermal performance base fluids like water, oil, ethylene glycol to enhance its quality of heat absorption in the heat exchangers. In that alumina nanoparticle played a significant role in many research applications and it has good thermal conductivity as a pure fluid. So, in this review work, the recent study of Al2O3 nanofluid with its preparation method, thermo-physical properties and its performance in varied heat exchangers have been discussed. This would enrich the knowledge and help the researchers who are interested in alumina nanofluid for their experimental works.

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Section: Resultsmentioning

confidence: 99%

Section: Stability Rheological and Agglomeration Propertiesmentioning

confidence: 99%

A Recent Examination on the Performance of Heat Exchangers using Al2O3 Nanofluid with Its Thermo Physical Properties

Armstrong¹,

Sivasubramanian²,

Selvapalam³

2019

IJEAT

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“…A convergence criterion of the iterative process, based on the maximum relative error between two successive iterations for velocity components, temperature and nanoparticles volume fraction, is adopted with an accuracy of 10 −6 . The developed computation code is validated by comparing the results of the present study firstly with those of the numerical investigation of Desrayaud and Lauriat [36] in the mixed convection regime inside a vertical plate channel, and secondly with those of the experimental work of Osman et al [48] conducted in a rectangular channel filled with (Al 2 O 3 -water) nanofluid. The velocity and temperature profiles illustrated in Figs.…”

Section: Entropy Generationmentioning

confidence: 90%

Mixed convection heat transfer and entropy generation analysis of copper–water nanofluid in a vertical channel with non-uniform heating

2019

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This paper reports results of a numerical investigation on mixed convection heat transfer and entropy generation for water-copper nanofluid within a vertical channel. The left wall is subjected to a heat flux density of sinusoidal variation, while the right one is cooled at uniform density. The Buongiorno model is employed to describe the nanofluid flow in order to take into account the thermophoresis effect and the Brownian motion. The governing equations are solved numerically using the finite volume method with the SIMPLE algorithm. The effects of pertinent parameters including the Richardson number (Ri), the heat flux ratio (R q) and the nanoparticles volume fraction (ϕ i) on the flow and thermal fields, as well as the entropy generation are analyzed for both non-uniform and uniform heating. The results show that the heat transfer rate and the various irreversibility modes are increased with the rise of Ri and R q and the reduction of ϕ i. It is also found that a sinusoidal heating is beneficial for the mean Nusselt number but, unfortunately, it is not favorable for the total entropy generation with augmentation rates of up to 7% and 14%, respectively. A map of the flow reversal occurrence is performed and reveals that the latter is strongly affected by the control parameters. In addition, a correlation is proposed to predict the onset of this phenomena with a maximum deviation of 5% compared to the numerical results.

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“…Giwa et al [42] studied the influence of thermo-physical properties, temperature and volume concentration of nanoparticle on the thermal and flow behavior and employed difficult machine learning techniques to predict the thermo-physical properties of nanofluid. Osman et al [43] conducted experimental assessment to evaluate the convective heat transfer coefficient in transitional flow regimes. Alumina-water was employed as the working fluid.…”

Section: Introductionmentioning

confidence: 99%

Heat and Fluid Flow Analysis and ANN-Based Prediction of A Novel Spring Corrugated Tape

et al. 2021

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A circular tube fitted with novel corrugated spring tape inserts has been investigated. Air was used as the working fluid. A thorough literature review has been done and this geometry has not been studied previously, neither experimentally nor theoretically. A novel experimental investigation of this enhanced geometry can, therefore, be treated as a new substantial contribution in the open literature. Three different spring ratio and depth ratio has been used in this study. Increase in thermal energy transport coefficient is noticed with increase in depth ratio. Corrugated spring tape shows promising results towards heat transfer enhancement. This geometry performs significantly better (60% to 75% increase in heat duty at constant pumping power and 20% to 31% reduction in pumping power at constant heat duty) than simple spring tape. This paper also presented a statistical analysis of the heat transfer and fluid flow by developing an artificial neural network (ANN)-based machine learning (ML) model. The model is evaluated to have an accuracy of 98.00% on unknown test data. These models will help the researchers working in heat transfer enhancement-based experiments to understand and predict the output. As a result, the time and cost of the experiments will reduce. The results of this investigation can be used in designing heat exchangers.

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Experimental investigation of convection heat transfer in the transition flow regime of aluminium oxide-water nanofluids in a rectangular channel

Cited by 74 publications

References 42 publications

A Recent Examination on the Performance of Heat Exchangers using Al2O3 Nanofluid with Its Thermo Physical Properties

A Recent Examination on the Performance of Heat Exchangers using Al2O3 Nanofluid with Its Thermo Physical Properties

Mixed convection heat transfer and entropy generation analysis of copper–water nanofluid in a vertical channel with non-uniform heating

Heat and Fluid Flow Analysis and ANN-Based Prediction of A Novel Spring Corrugated Tape

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