Application of a novel hybrid nanofluid containing graphene–platinum nanoparticles in a chaotic twisted geometry for utilization in miniature devices: Thermal and energy efficiency considerations

Bahiraei, Mehdi; Mazaheri, Nima

doi:10.1016/j.ijmecsci.2018.02.030

Cited by 55 publications

(16 citation statements)

References 26 publications

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“…Different combinations of nanoparticles and base fluid were also considered, i.e. MgO-MWCNT/ethylene glycol by Soltani and Akbari (2016), MgO-MWCNTs/EG by Vafaei et al (2017), TiO 2 -Cu/H 2 O by Ghadikolaei et al (2017), Ag-CuO/water by Hayat and Nadeem (2017) and Hayat et al (2018), Cu-Ag/water by Hassan et al (2018b), Ag-MgO/water by Ghalambaz et al (2019) and graphene-platinum hybrid nanofluids by Bahiraei and Mazaheri (2018), respectively. Devi and Devi (2016a) and Devi (2017, 2016b) investigated on the boundary layer flow of hybrid Cu-Al 2 O 3 /water nanofluid numerically due to a stretching sheet.…”

Section: Introductionmentioning

confidence: 99%

Thermal Marangoni Flow Past a Permeable Stretching/Shrinking Sheet in a Hybrid Cu-Al2O3/Water Nanofluid

Khashi’ie¹,

Arifin²,

Pop³

et al. 2020

JSM

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The present study accentuates the Marangoni convection flow and heat transfer characteristics of a hybrid Cu-Al 2 O 3 / water nanofluid past a stretching/shrinking sheet. The presence of surface tension due to an imposed temperature gradient at the wall surface induces the thermal Marangoni convection. A suitable transformation is employed to convert the boundary layer flow and energy equations into a nonlinear set of ordinary (similarity) differential equations. The bvp4c solver in MATLAB software is utilized to solve the transformed system. The change in velocity and temperature, as well as the Nusselt number with the accretion of the dimensionless Marangoni, nanoparticles volume fraction and suction parameters, are discussed and manifested in the graph forms. The presence of two solutions for both stretching and shrinking flow cases are noticeable with the imposition of wall mass suction parameter. The adoption of stability analysis proves that the first solution is the real solution. Meanwhile, the heat transfer rate significantly augments with an upsurge of the Cu volume fraction (shrinking flow case) and Marangoni parameter (stretching flow case). Both Marangoni and Cu volume fraction parameters also can decelerate the boundary layer separation process.

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Section: Introductionmentioning

confidence: 99%

Thermal Marangoni Flow Past a Permeable Stretching/Shrinking Sheet in a Hybrid Cu-Al2O3/Water Nanofluid

Khashi’ie¹,

Arifin²,

Pop³

et al. 2020

JSM

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“…As a new heat transfer enhancement technology, chaotic convection has received increasing attention in recent years. The research of the 3‐D chaotic twisted geometry was mainly concentrated on heat transfer by Babiraei et al It was concluded that the Lagrangian dynamics quickly evolves into a complicated flow pattern because of small‐scale structural changes. In previous studies, the hydrothermal features and temperature uniformity of C‐shaped channel are studied at low Reynolds.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the articles mentioned above about chaotic flow channels, the heat and mass transfer statuses are changed because of Lagrange chaos produced due to chaotic structures in flow channels. As the temperature uniformity and output performance of PEMFCs can be affected largely by the heat and mass transfer inside, the chaotic structures could be effective in improving the performance of PEMFC.…”

Section: Introductionmentioning

confidence: 99%

The energy performance improvement of a PEM fuel cell with various chaotic flowing channels

et al. 2019

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Summary To improve the energy performance of a proton exchange membrane fuel cell (PEMFC), novel chaotic structures are proposed and numerically evaluated for replacing straight types in the serpentine gas diffusion flow channels. The numerical model is verified by the available experimental data. Nine cases (chaotic channels, Cases A2, B1, B2, C1, C2, D1, D2, E1, and E2) and a baseline case (straight flow channel, Case A1) are evaluated, and the detailed temperature and the flow characteristics are presented and analyzed. The influences of the main design parameters including the corner angle, bends number, and datum surface number are also analyzed and concluded. It is found that the newly proposed chaotic structures can improve not only the temperature uniformity, but also the maximum output power and the energy efficiency of the PEMFC. Compared with a traditional PEMFC, the power output of the new PEMFCs with chaotic flowing channels can be improved by 6.26% and the efficiency of PEMFC can be promoted by 8.40%.

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“…Combination of CNTs into

A {normall}_{2} {normalO}_{3}

develops heat‐conducting capacity of the base liquid, which was discussed by Nuim Labib et al Bahiraei et al explored the incorporation of graphene and Ag nanoparticles, which can be used as coolant. Likewise, numerous analysts have demonstrated that the thermal boundary of a liquid can be upgraded by considering a solitary and two nanoadded substances …”

Section: Introductionmentioning

confidence: 99%

Impact of homogeneous‐heterogeneous reactions in a hybrid nanoliquid flow due to porous medium

Ramesh¹,

Manjunatha

Gireesha

2019

Heat Trans. Asian Res.

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Chemical responses are investigated as a piece of the modern applications like hydrometallurgical industry, food processing, and polymer production. Numerous chemical responding structures consolidate homogeneous and heterogeneous response and it is especially eccentric. Hence, this paper explains how the hybrid nanoliquid flow is handy in accelerate the thermochemical possessions of the base fluid in existence of homogeneous-heterogeneous reactions. Here, three different types of hybrid nanoliquid used are copper-Al 2 O 3 / water, silver-Al 2 O 3 /water, and gold-Al 2 O 3 /water. Outcoming differential systems are resolved numerically by adopting fourth-order and fifth-order Runge-Kutta-Fehlberg method. To get better view of the topic, the flow field, temperature behavior, and concentration curves are investigated for particular estimations of critical elements. The results predict that gold-Al 2 O 3 / water nanoliquid has good impact of heat rate coefficient and further porosity parameter decelerates the velocity and accelerates the temperature of the hybrid nanofluid. K E Y W O R D S homogeneous-heterogeneous reactions, hybrid nanoliquid, numerical solutions, porous medium, stretching sheet

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Application of a novel hybrid nanofluid containing graphene–platinum nanoparticles in a chaotic twisted geometry for utilization in miniature devices: Thermal and energy efficiency considerations

Cited by 55 publications

References 26 publications

Thermal Marangoni Flow Past a Permeable Stretching/Shrinking Sheet in a Hybrid Cu-Al2O3/Water Nanofluid

Thermal Marangoni Flow Past a Permeable Stretching/Shrinking Sheet in a Hybrid Cu-Al2O3/Water Nanofluid

The energy performance improvement of a PEM fuel cell with various chaotic flowing channels

Impact of homogeneous‐heterogeneous reactions in a hybrid nanoliquid flow due to porous medium

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