Effect of nanoparticle shapes on the heat transfer enhancement in a wavy channel with different phase shifts

Vanaki, Shayan Mokhtarpour; Mohammed, Hussein A.; Abdollahi, Ayoub; Wahid, Mazlan Abdul

doi:10.1016/j.molliq.2014.03.001

Cited by 139 publications

(50 citation statements)

References 33 publications

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“…: +989151811311; fax: +985812244818. Vanaki et al [7]. The nanofluid with the platelets nanoparticle shape gives the highest heat transfer enhancement.…”

Section: Introductionmentioning

confidence: 98%

Al 2 O 3 –water nanofluid inside wavy mini-channel with different cross-sections

Khoshvaght-Aliabadi

Sadri

Hormozi

2016

Journal of the Taiwan Institute of Chemical Engineers

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“…: +989151811311; fax: +985812244818. Vanaki et al [7]. The nanofluid with the platelets nanoparticle shape gives the highest heat transfer enhancement.…”

Section: Introductionmentioning

confidence: 98%

Al 2 O 3 –water nanofluid inside wavy mini-channel with different cross-sections

Khoshvaght-Aliabadi

Sadri

Hormozi

2016

Journal of the Taiwan Institute of Chemical Engineers

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“…The thermophysical properties of nanofluids (density, heat capacity, thermal conductivity and viscosity are calculated based on the correlations given in these References [33][34][35][36]. …”

Section: Grid Testing and Model Validationmentioning

confidence: 99%

Influence of nanofluids on the efficiency of Flat-Plate Solar Collectors (FPSC)

et al. 2017

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Abstract.A numerical investigation is performed using finite volume method to study the laminar heat transfer in a three-dimensional flat-plate solar collector using different nanofluids as working fluids. Three nanofluids with different types of nanoparticles (Ag, MWCNT and Al2O3 dispersed in water) with 1-2 wt% volume fractions are analyzed. A constant heat flux, equivalent to solar radiation absorbed by the collector, is applied at the top surface of the absorber plate. In this study, several parameters including boundary conditions (different volume flow rates, different fluid inlet temperatures and different solar irradiance at Skudai, Malaysia), different types of nanoparticles, and different solar collector tilt angles are investigated to identify their effects on the heat transfer performance of FPSC. The numerical results reveal that the three types of nanofluid enhance the thermal performance of solar collector compared to pure water and FPSC with Ag nanofluid has the best thermal performance enhancement. For all the cases, the collector efficiency increased with the increase of volume flow rate while fluid outlet temperature decreased. It is found that FPSC with tilt angle of 10° and fluid inlet temperature of 301.15 K has the best thermal performance.

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“…The consequences indicate that the highest heat transfer enhancement is achieved with ܱܵ݅ ଶ nanofluid and the flow friction not significantly change with by means of dissimilar types of nanoparticles in the base fluid. Vanaki et al (2014) examined the outcomes of numerous nanofluids on the thermal and stream fields over transversely wavy wall passages with dissimilar phase shifts between the upper and lower wavy walls. Their results indicated that the wavy duct performance was importantly influenced by altering the phase shift and the wavy amplitude.…”

Section: Introductionmentioning

confidence: 99%

“…From this brief review [Navaei et al (2015); Vanaki and Mohammed (2015); Al-Shamani et al (2015); Parsazadeh et al (2013); Vanaki et al (2014); Ahmed et al (2013); Manca et al (2012); Mohammed et al (2012); Haridas et al (2015); Abed et al (2015)] it follows that currently in the field of turbulent heat transfer of nanofluids there are still many unresolved issues. In particular, most of the works do not discuss in principle the issue of thermal-hydraulic efficiency of TiO ଶ െ H ଶ O based nanofluid flow in V-pattern protruded rib square channel on heat transfer and flow friction.…”

Section: Introductionmentioning

confidence: 99%

DEVELOPMENT OF NEW CORRELATIONS FOR NUSSELT NUMBER AND FRICTION FACTOR OF TiO_2/WATER BASED NANOFLUID FLOW IN V-PATTERN PROTRUSION RIBBED SQUARE CHANNEL

Kumar¹,

Singh²,

Maithani³

et al. 2018

Frontiers in Heat and Mass Transfer

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Nanofluids play important roles in the heat transfer and flow characteristics in ribbed square channels. Systematic experiments are conducted to measure heat transfer enhancement and TiO ଶ െ H ଶ O based nanofluid flow characteristics on a protruded with combined V-type ribbed square channel. Reynolds number studied in the channel range from 4000-18000. Investigational parameters of square channel contain, volume fraction range of 1.0-4.0%, particle diameter range of 30nm-45nm, relative protruded rib height range of 0.10-0.25, ratio of protruded height to print diameter range of 0.8-2.0, relative protruded rib pitch ratio range of 2.0-3.5 and angle of attack of 30 0 -75 0 respectively. Results indicates that the thermal performance of the protruded combined V-type ribbed square channel falls with increasing Reynolds number. The highest value of thermal hydraulic performance parameter is found to be 3.21for the range of parameters investigated. Correlations predicting Nusselt number and friction factor as a function of volume fraction, particle diameter range, relative protruded rib height, ratio of protruded height to print diameter, relative protruded rib pitch ratio, angle of attack and flow parameter. The correlations for Nusselt number and friction factor have also been developed on the basis of experimental data with considerable good accuracy.

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Effect of nanoparticle shapes on the heat transfer enhancement in a wavy channel with different phase shifts

Cited by 139 publications

References 33 publications

Al 2 O 3 –water nanofluid inside wavy mini-channel with different cross-sections

Al 2 O 3 –water nanofluid inside wavy mini-channel with different cross-sections

Influence of nanofluids on the efficiency of Flat-Plate Solar Collectors (FPSC)

DEVELOPMENT OF NEW CORRELATIONS FOR NUSSELT NUMBER AND FRICTION FACTOR OF TiO_2/WATER BASED NANOFLUID FLOW IN V-PATTERN PROTRUSION RIBBED SQUARE CHANNEL

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