Pressure drop and thermal characteristics of CuO–base oil nanofluid laminar flow in flattened tubes under constant heat flux

Razi, Pooyan; Akhavan-Behabadi, M.A.; Saeedinia, M.

doi:10.1016/j.icheatmasstransfer.2011.04.010

Cited by 131 publications

(38 citation statements)

References 17 publications

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“…Results from Razi et al [248] experiments also showed that the Nusselt number for the CuO-oil nanofluid (¡2 wt% particle concentration) in the fully developed hydrodynamic laminar flow regime (Re < 120) and within flattened tubes (1 < D/D h < 1.3) can be interpolated by:…”

Section: Efficiency Of Nanofluid Coolantsmentioning

confidence: 97%

“…In a experimental study, Razi et al [248] investigated the heat transfer and pressure drop characteristics of the flow of a nanofluid in a tube. To improve the heat transfer coefficient, they adopted nanofluid coolants (i.e.…”

Section: Efficiency Of Nanofluid Coolantsmentioning

confidence: 99%

“…(47), a performance index (η I ) greater than 1 implies that the advantages due to heat transfer enhancement by either nanofluid or flattened tubes overcome the increase in pressure drop. In particular, Razi et al [248] found that a maximum value for the performance index (i.e. η I =1.43) was observed for the nanofluid flow within flattened tubes with internal height of 7.5 mm and Re=23.5.…”

Section: Efficiency Of Nanofluid Coolantsmentioning

confidence: 99%

See 2 more Smart Citations

A review on the heat and mass transfer phenomena in nanofluid coolants with special focus on automotive applications

Bigdeli

Fasano

Cardellini

et al. 2016

Renewable and Sustainable Energy Reviews

117

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Engineered suspensions of nanosized particles (nanofluids) may be characterized by enhanced thermal properties. Due to the increasing need for ultrahigh performance cooling systems, nanofluids have been recently investigated as next-generation coolants for car radiators. However, the multiscale nature of nanofluids implies nontrivial relations between their design characteristics and the resulting thermo-physical properties, which are far from being fully understood. In this work, the role of fundamental heat and mass transfer mechanisms governing thermo-physical properties of nanofluids is reviewed, both from experimental and theoretical point of view. Particular focus is devoted to highlight the advantages of using nanofluids as coolants for automotive heat exchangers, and a number of design guidelines is reported for balancing thermal conductivity and viscosity enhancement in nanofluids. We hope this review may help further the translation of nanofluid technology from small-scale research laboratories to industrial application in the automotive sector.

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Section: Efficiency Of Nanofluid Coolantsmentioning

confidence: 97%

Section: Efficiency Of Nanofluid Coolantsmentioning

confidence: 99%

Section: Efficiency Of Nanofluid Coolantsmentioning

confidence: 99%

See 1 more Smart Citation

A review on the heat and mass transfer phenomena in nanofluid coolants with special focus on automotive applications

Bigdeli

Fasano

Cardellini

et al. 2016

Renewable and Sustainable Energy Reviews

117

View full text Add to dashboard Cite

show abstract

“…The experimental results showed that the dimpled tube friction factors were about 2-10% higher than the plain tube of isothermal pressure drop. Razi et al (2011) studied the pressure drop and heat transfer characteristics of nanofluid flow inside horizontal flattened tubes. When nanofluids flow in flattened tubes, they have superior heat transfer characteristics rather than in the round tube.…”

Section: Experimental Studies On Forced Convective Heat Transfer Of Nmentioning

confidence: 99%

A comprehensive review of experimental investigations of forced convective heat transfer characteristics for various nanofluids

Gupta

Arora

Kumar

et al. 2014

Int J Mech Mater Eng

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Nanofluids are suspension of nanoparticles (less than 100 nm) in the conventional base fluids. The dispersed solid metallic or non-metallic nanoparticles change the thermal properties like thermal conductivity, viscosity, specific heat, and density of the base fluid. Past studies focused on measuring the thermal properties of nanofluids. These suspended nanoparticles effectively improve the transport properties and heat transfer characteristics of the base fluids. Recently, heat transfer augmentation using suspensions of nanometre-sized solid particles in base liquids have been investigated by various research groups across the world. This paper reviews the state-of-the-art nanofluid studies in the area of forced convection heat transfer enhancement. The results for the heat transfer characteristics in internal flow with constant heat flux and constant wall temperature boundary conditions reported by various researchers have been compiled and reviewed. Further, in heat exchangers, the real boundary conditions are different from the constant heat flux and constant wall temperature boundary conditions. Over a span of 2 decades, the literature in this field is widespread; hence, this review would be useful for researchers to have a precise screening of a wide range of investigations in this area.

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“…By increasing the Reynolds number, the ratio of the coefficient of nanofluid to that of pure water decreased. Oil based CuO nanofluids were investigated under laminar flow conditions by Saeedinia et al [20], Pooyan Razi et al [21], and Hashemi and AkhavanBehabadi [22]. The presence of CuO particles in the oil base liquid increased the heat transfer much more than base oil [20,21].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Heat Transfer and Pressure Drop of CuO‐Water Nanofluid

Şahin

Manay

Akyürek

2015

Journal of Nanomaterials

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Heat transfer and pressure drop characteristics of water based CuO nanofluid inside a horizontal tube were investigated experimentally. The upper limitation of the particle volume fraction with respect to heat transfer performance was also found. CuO-water nanofluids with volume fractions of 0.5%, 1%, 2%, and 4% were prepared by dispersing the CuO nanoparticles with an average diameter of 33 nm into deionised water. Experiments were carried out under the steady-state, constant heat flux, and turbulent flow regime conditions. The variations of the average Nusselt number and the friction factor with the Reynolds number were presented. For all given particle volume concentrations, heat transfer enhancements were calculated. It was concluded that the particle volume concentrations higher than 1% vol. were not appropriate with respect to the heat transfer performance of the CuOwater nanofluid. No heat transfer enhancement was observed at Re = 4.000. The highest heat transfer enhancement was achieved at Re = 16.000 and C = 0.005.

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Pressure drop and thermal characteristics of CuO–base oil nanofluid laminar flow in flattened tubes under constant heat flux

Cited by 131 publications

References 17 publications

A review on the heat and mass transfer phenomena in nanofluid coolants with special focus on automotive applications

A review on the heat and mass transfer phenomena in nanofluid coolants with special focus on automotive applications

A comprehensive review of experimental investigations of forced convective heat transfer characteristics for various nanofluids

An Experimental Study on Heat Transfer and Pressure Drop of CuO‐Water Nanofluid

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