Numerical investigation of cooling performance with the use of Al2O3/water nanofluids in a radial flow system

Yang, Yue-Tzu; Lai, Feng-Hsiang

doi:10.1016/j.ijthermalsci.2010.08.017

Cited by 33 publications

(18 citation statements)

References 42 publications

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“…The investigation on nanofluid behaviour is becoming more and more popular, as testified by recent reviews and papers on this issue [35][36][37][38][39][40][41][42][43][44] but inconsistencies in published data and disagreements on the heat transfer mechanisms have been underlined by Keblinski et al [45] and recently by Gherasim et al [46]. However, a few examples of studies on nanofluids in impinging jets have been investigated experimentally and numerically and, according to the best knowledge of the present authors, their investigations have been reported in [46][47][48][49][50][51][52][53][54][55][56][57][58][59]. Roy et al [50] provided the first numerical results on the hydrodynamic and thermal fields of Al 2 O 3 /water nanofluid in a radial laminar flow cooling system, underlining a heat transfer enhancement up to 200% in the case of a nanofluid with 10% in nanoparticle volume concentration at a Reynolds number equal to 1200.…”

Section: Advances In Mechanical Engineeringmentioning

confidence: 78%

“…Gherasim et al [46] highlighted the limitations in the use of Al 2 O 3 /water nanofluid in a radial flow configuration due to the significant increase in the associated pumping power. Also, Yang and Lai presented numerical results on confined jets with constant [55] and temperature-dependent [56] properties. Results confirmed the Nusselt number increases with the increase of Reynolds number and nanoparticle volume fraction and the increase in pressure drop.…”

Section: Advances In Mechanical Engineeringmentioning

confidence: 99%

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Numerical Study of Laminar Confined Impinging Slot Jets with Nanofluids

Lorenzo¹,

Manca²,

Nardini³

et al. 2012

Advances in Mechanical Engineering

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A solution to obtain efficient cooling systems is represented by the use of confined or unconfined impinging jets. Moreover, the possibility of improving the thermal performances of the working fluids can be taken into account and the introduction of nanoparticles in a base fluid can be considered. In this paper, a numerical investigation on confined impinging slot jet working with a mixture of water and Al 2 O 3 nanoparticles is described. The flow is laminar and a uniform temperature is applied on the target surface. The single-phase model approach has been adopted. Different geometric ratios, particle volume concentrations, and Reynolds numbers have been considered in order to study the behaviour of the system in terms of average and local Nusselt number, convective heat transfer coefficient and required pumping power profiles, temperature fields, and stream function contours.

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Section: Advances In Mechanical Engineeringmentioning

confidence: 78%

Section: Advances In Mechanical Engineeringmentioning

confidence: 99%

Numerical Study of Laminar Confined Impinging Slot Jets with Nanofluids

Lorenzo¹,

Manca²,

Nardini³

et al. 2012

Advances in Mechanical Engineering

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“…The mechanism for improved thermal conductivity could be illustrated by Brownian motion of the nanoparticles 28 . Nanoparticles concentration, particles size, and operating temperature are the key parameters that control the motion of nanoparticles 27,29‐31 . With increasing concentration of Al 2 O 3 nanoparticles the Brownian motion increases substantially, which in turn improves the thermal conductivity of nanofluid 28,32,33 .…”

Section: Resultsmentioning

confidence: 99%

Efficiency and effectiveness enhancement of an intercooler of two‐stage air compressor by low‐cost Al₂O₃/water nanofluids

2020

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The present study was aimed to utilize low‐cost alumina (Al2O3) nanoparticles for improving the heat transfer behavior in an intercooler of two‐stage air compressor. Experimental investigation was carried out with three different volume concentrations of 0.5%, 0.75%, and 1.0% Al2O3/water nanofluids to assess the performance of the intercooler, that is, counterflow heat exchanger at different loads. Thermal properties such as thermal conductivity and overall heat transfer coefficient of nanofluid increased substantially with increasing concentration of Al2O3 nanoparticles. Specific heat capacity of nanofluids were lower than base water. The intercooler performance parameters such as effectiveness and efficiency improved appreciably with the employment of nanofluid. The efficiency increased by about 6.1% with maximum concentration of nanofluid, that is, 1% at 3‐bar compressor load. It is concluded from the study that high concentration of Al2O3 nanoparticles dispersion in water would offer better heat transfer performance of the intercooler.

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“…Recently, numerous other theoretical investigations by different researchers (Bianco et al, 2009;Ebrahimnia-Bajestan et al, 2011;Farsad et al, 2011;Fazeli et al, 2012;Haghshenas Fard et al, 2010;Kalteh et al, 2012;Kamali and Binesh, 2010;Kamyar et al, 2012;Mahmoodi and Hashemi, 2012;Manca et al, 2012;Rana and Bhargava, 2011;Rostamani et al, 2010;Singh et al, 2012;Tahery et al, 2011;Yang and Lai, 2011;Yu et al, 2011) on nanofluid convective heat transfer were carried out, but all of them did not consider the van der Walls interaction and agglomeration phenomena of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

CFD and experimental investigation on the heat transfer characteristics of alumina nanofluids under the laminar flow regime

Azari

Kalbasi

Rahimi

2014

Braz. J. Chem. Eng.

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-This study reports experimental and Computational Fluid Dynamics (CFD) investigations of the laminar convective heat transfer coefficient of Al 2 O 3 /water nanofluids in a circular tube under uniform and constant heat flux on the wall. Three different models including a constant physical properties single-phase (CP-SP) model, a variable physical properties single-phase (VP-SP) model and a discrete particles two-phase model were developed. Particle agglomeration and cluster size distribution were considered in the two-phase model. Experimental and simulation results showed that the thermal performance of nanofluids is higher than that of the base fluid and the heat transfer enhancement increases with the particle volume concentration and Reynolds number. Furthermore, higher heat transfer coefficients were detected in the case of the VP-SP model and the two-phase model. The results demonstrated that the two-phase model prediction and experimental data match significantly and that the model can be employed with confidence for the prediction of any type of nanofluid.

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Numerical investigation of cooling performance with the use of Al2O3/water nanofluids in a radial flow system

Cited by 33 publications

References 42 publications

Numerical Study of Laminar Confined Impinging Slot Jets with Nanofluids

Numerical Study of Laminar Confined Impinging Slot Jets with Nanofluids

Efficiency and effectiveness enhancement of an intercooler of two‐stage air compressor by low‐cost Al₂O₃/water nanofluids

CFD and experimental investigation on the heat transfer characteristics of alumina nanofluids under the laminar flow regime

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Numerical investigation of cooling performance with the use of Al2O3/water nanofluids in a radial flow system

Cited by 33 publications

References 42 publications

Numerical Study of Laminar Confined Impinging Slot Jets with Nanofluids

Numerical Study of Laminar Confined Impinging Slot Jets with Nanofluids

Efficiency and effectiveness enhancement of an intercooler of two‐stage air compressor by low‐cost Al2O3/water nanofluids

CFD and experimental investigation on the heat transfer characteristics of alumina nanofluids under the laminar flow regime

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Efficiency and effectiveness enhancement of an intercooler of two‐stage air compressor by low‐cost Al₂O₃/water nanofluids