Numerical Study on Performance of Flat Tube with Water Based Copper Oxide Nanofluids

Sharma, Pankaj; Kumar, Vijay; Sokhal, Gurpreet Singh; Gangacharyulu, D.; Bulasara, Vijaya Kumar

doi:10.1016/j.matpr.2020.01.234

Cited by 15 publications

(4 citation statements)

References 14 publications

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“…Hence, the enhancement in the heat transfer performance of the flat tube with the bend as compared with performance of the tube without the bend is higher at a higher Reynolds number. Similar trends for both the heat transfer coefficient and Nusselt number were observed by Sharma et al [52] in the study of the flow of nanofluid through the flat tube.…”

Section: Nusselt Numbersupporting

confidence: 85%

“…The nanofluids selected for this study are alumina, CuO, and carbon nanotubes. These nano-fluids are selected due to their capability of producing high heat transfer performance through flat tubes [52,53]. The study conducted by Selimefendigil et al [54] also concludes that inclusion of CNT nanoparticles in the base fluid resulted in the performance coefficient enhancement of 52% at the highest solid volume fraction.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of the Performance of Applying Different Nanofluids in a Tube with a 90° Bend at the Center of the Tube

Kumar

Sokhal

Khalilpoor

et al. 2021

Journal of Nanomaterials

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This research manuscript addresses the study of the performance of a flat tube having a 90° bend under the flow of three different nanofluids such as copper oxide, multiwalled carbon nanotubes, and aluminum oxide/water nanofluids at different inlet fluid temperatures and Reynolds numbers. The performance of the flat tube is analyzed under the Reynolds number between 5000 and 11000 and a fluid inlet temperature range of 35°C–50°C. The results obtained in this study show that the heat transfer coefficient increases with the increase in volume concentration as well as Reynolds number. The maximum heat transfer coefficient is obtained using multiwalled carbon nanotubes followed by copper oxide and then aluminum oxide. This study also illustrates that the friction factor increases with the increase in volume concentration and decrease in Reynolds number. The results of the numerical study have been validated with the help of an experimental study. The study has proved that the use of nanofluids instead of the conventional fluid can lead to reducing the size of the tube for the same amount of heat transfer which can prove the reduction of the size in heat transfer equipment. Furthermore, it is also observed in this study that the presence of the 90° bend in the flat tube improved the heat transfer performance due to the increased turbulence at the bent section of the tube.

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Section: Nusselt Numbersupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Performance of Applying Different Nanofluids in a Tube with a 90° Bend at the Center of the Tube

Kumar

Sokhal

Khalilpoor

et al. 2021

Journal of Nanomaterials

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“…Based on their findings, both parameters of Nusselt number and friction factor of nanofluids were greater than the base fluid. In the course of his investigation, Sharmaet et al 15 hydro-thermal behavior of water-CuO-based nanofluid in a flat tube was examined. They discovered that across the pipe the thermal transmission and pressure losses enhanced with an increment of the volumetric concentration of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…Figure15. Average Nusselt number versus porous thickness ratio for various Darcy numbers using water as base fluid (porosity applied at center of U-bend pipe).…”

mentioning

confidence: 99%

Numerical study of heat transfer and pressure drop of nanofluids in a combined porous media of hydrophobic and hydrophilic surfaces

Babaei

Aminian

Saffari

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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The present study provides a 3D numerical research on the hydro-thermal performance of water-Al2O3/CuO nanofluids and water/Al2O3-CuO hybrid nanofluid inside a U-bend tube incorporating a porous medium with both hydrophilic and hydrophobic surfaces. Furthermore, a single-phase flow is adopted to simulate the nanofluid flow. Taking into consideration the equation of the Darcy-Brinkman-Forchheimer, to simulate the flow of fluids in the porous media. The influence of Dean number on hydro-thermal performance in the range of (600–1750) was investigated. And according to the results, Dn = 600 had the best performance. Considering the outcomes, a completely hydrophobic wall has a better hydro-thermal performance than a completely hydrophilic one and other hydrophilicity and hydrophobicity combinations. As well, improvement in heat transfer efficiency is considerably influenced by the Darcy number (10−4–10−1) and the augmentation of the porous thickness ratio. Additionally, average Nusselt number and pressure losses for any and all types of nanofluids show an incremental schema with augmenting volume fraction, while PEC exhibits a reducing pattern. Besides this, structures with permeable porous media or ones with Da = 0.1 and rp = 0.6 present the highest PEC. Also, among the reviewed nanoparticles, Al2O3 with a volume percentage of 1% had the maximum PEC.

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Effect of using a ZnO-TiO2/water hybrid nanofluid on heat transfer performance and pressure drop in a flat tube with louvered finned heat exchanger

Elibol,

Gonulacar,

Aktas

et al. 2024

J Therm Anal Calorim

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This study used an experimental setup consisting of a flat tube with a louvered finned crossflow configuration to examine the effects of utilizing a ZnO-TiO2-water hybrid nanofluid on heat transfer rate, heat transfer coefficient, Nusselt number, and pressure drop. The studies were carried out under laminar flow conditions (200 < Re < 800), at four different temperatures (50, 60, 70, 80 °C), four different volume concentrations of nanoparticles (0.025, 0.05, 0.1, 0.2%), and three different volume flow rates (4, 6, 8 LPM). The findings were compared with pure water (0%). The results indicate that using hybrid nanofluid improves the heat transfer performance and increases pressure loss in comparison with pure water. When comparing hybrid nanofluid to pure water, the largest increases in heat transfer rate, heat transfer coefficient, Nusselt number, and pressure drop were 87.8%, 21.7%, 26.4%, and 10%, respectively. In addition, it was found that, up to a specific value (0.05%), increasing the nanoparticle volume concentration enhanced the heat transfer rate, heat transfer coefficient and Nusselt number, but which began to decrease on increasing the concentration past this value. Therefore, it was concluded that nanoparticle volume concentrations greater than 0.05% negatively affect heat transfer under the current operating conditions. The maximum heat transfer rate, heat transfer coefficient, and Nusselt number were obtained under the conditions of an 8 LPM volume flow rate, 80 °C inlet temperature, and 0.05% volume concentration.

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Numerical Study on Performance of Flat Tube with Water Based Copper Oxide Nanofluids

Cited by 15 publications

References 14 publications

Numerical Simulation of the Performance of Applying Different Nanofluids in a Tube with a 90° Bend at the Center of the Tube

Numerical Simulation of the Performance of Applying Different Nanofluids in a Tube with a 90° Bend at the Center of the Tube

Numerical study of heat transfer and pressure drop of nanofluids in a combined porous media of hydrophobic and hydrophilic surfaces

Effect of using a ZnO-TiO2/water hybrid nanofluid on heat transfer performance and pressure drop in a flat tube with louvered finned heat exchanger

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