Control of the free convective heat transfer using a U-shaped obstacle in an Al2O3-water nanofluid filled cubic cavity

Al-Sayagh, Rajab

doi:10.21833/ijaas.2021.07.004

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…According to the experimental content, the authors divided it into a nanofluid stability experimental system and a nanofluid convective heat transfer system [11].…”

Section: Nanofluidic Experimental Systemmentioning

confidence: 99%

Application of Nanofluid Electrochemistry in Heat Dissipation of Permanent Magnet Synchronous Motors

Lin

Xie

2022

Journal of Chemistry

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In order to solve the problem of heat dissipation of permanent magnet synchronous motors, a technology using the principle of nanofluid electrochemistry is proposed. The main content of this technology is based on the characteristics and applications of nanofluids; according to the experimental system, the preparation and experimental parameters of nanofluids were determined; finally, by studying the influence of ultrasonic oscillation time and dispersant on the stability of nanofluids, it was concluded that the improvement of the thermal conductivity of nanofluids contributed to the improvement of the heat transfer rate of nanofluids. Experimental results show that when the volume fraction is 0.5, the increase rate of thermal conductivity is 1.51, the increase rate of convective heat transfer coefficient is 20.33, and the increase rate of convective heat transfer coefficient is greater than that of thermal conductivity, which shows that nanofluids have very good heat dissipation ability. It is proved that the technical research of nanofluid can meet the heat dissipation requirements of a permanent magnet synchronous motor.

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“…According to the experimental content, the authors divided it into a nanofluid stability experimental system and a nanofluid convective heat transfer system [11].…”

Section: Nanofluidic Experimental Systemmentioning

confidence: 99%

Application of Nanofluid Electrochemistry in Heat Dissipation of Permanent Magnet Synchronous Motors

Lin

Xie

2022

Journal of Chemistry

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“…Waini et al [10] discussed the effect of the stretching ratio on hybrid nanofluid permeable wedge flow and saw that the heat transfer rate is higher in the case of the hybrid nanofluid than the regular nanofluid. Rajab Al-Sayagh [11] studied the free convection heat transfer flow over a U-shaped obstacle by taking 2 3 Al O -water nanofluid. Khan and Pop [12] examined the BL flow past a wedge moving in a nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Influence of Slip Parameter, Viscous Dissipation and Joule Heating Effect on Boundary Layer Flow and Heat Transfer Over a Power-Law Stretching Wedge-Shaped Surface with the Correlation Coefficient and Multiple Regressions

Ali

Alim

2022

International Journal of Applied Mechanics and Engineering

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The influence of slip parameter, viscous dissipation, and Joule heating parameter on MHD boundary layer nanofluid flow over a permeable wedge-shaped surface was analysed. The PDEs and the associated boundary conditions were transformed to a set of non-similar ODEs and the obtained system of equations was solved numerically with the help of the spectral quasi-linearization method (SQLM) by applying suitable software. This method helps to identify the accuracy and convergence of the present problem. The current numerical results were compared with previously published work and are found to be similar. The fluid velocity, fluid temperature, and nanoparticle concentration within the boundary layer region for various values of the parameters such as the slip effect, magnetic strength, Prandtl number, Lewis number, stretching ratio, viscous dissipation, suction, Brownian motion, Joule heating, heat generation, and thermophoresis are studied. It is observed that the Brownian motion, Joule heating, viscous dissipation, and thermophoresis lead to decreases in the heat and mass transfer rate. The skin friction coefficient enhances with slip, magnetic, permeability, and suction parameters, but reduces with the Brownian motion, wedge angle, and stretching ratio parameters whereas there is no effect of mixed convection, thermophoresis, heat generation parameters, the Prandtl and Eckert number.

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Simulation of CuO-water nanofluid natural convection in a U-shaped enclosure with a T-shaped baffle

Zemani,

Ladjedel,

Sabeur

2023

J. Eng. Appl. Sci.

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The effect of aspect ratio and baffle shape on natural convection patterns in a U-shaped cavity filled with CuO water-based nanofluid is examined in detail, with a T-shaped baffle attached to the cold wall. To solve the coupled continuity, momentum, and energy equations, a finite volume method is used, and the pressure–velocity coupling is iteratively solved with the SIMPLE algorithm. The study investigates the impact of Rayleigh number (104–106), cavity aspect ratio (Ar = 0.4, 0.6), and nanoparticle volume fraction (0 ≤ ϕ ≤ 0.05) on flow pattern and heat transfer features. The results are presented graphically in the form of streamlines, isotherms, mean, and local Nusselt numbers. It is observed that the mean Nusselt number increases with an increase in Rayleigh number, nanoparticle volume fraction, and aspect ratio, resulting in an improvement in heat transfer. The T-shaped baffle enhances heat transfer compared to other baffles. Though changing the aspect ratio (0.4 ≤ Ar ≤ 0.6) does not alter the flow pattern, an increase in Ar leads to an enhancement in the heat transfer rate.

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Control of the free convective heat transfer using a U-shaped obstacle in an Al2O3-water nanofluid filled cubic cavity

Cited by 3 publications

References 35 publications

Application of Nanofluid Electrochemistry in Heat Dissipation of Permanent Magnet Synchronous Motors

Application of Nanofluid Electrochemistry in Heat Dissipation of Permanent Magnet Synchronous Motors

Influence of Slip Parameter, Viscous Dissipation and Joule Heating Effect on Boundary Layer Flow and Heat Transfer Over a Power-Law Stretching Wedge-Shaped Surface with the Correlation Coefficient and Multiple Regressions

Simulation of CuO-water nanofluid natural convection in a U-shaped enclosure with a T-shaped baffle

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