Recent advances on entropy analysis of composite nanofluids-A critical review

Samantaray, S.S.; Misra, A.; Shaw, S.; Nayak, M.K.; Nazari, S.; Boukhris, Imed; Chamkha, Ali J.

doi:10.1016/j.rineng.2024.101980

Cited by 17 publications

(1 citation statement)

References 121 publications

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“…This underscores the effectiveness of silica-shelled nanoparticles in enhancing convective heat transfer, possibly due to increased surface area and altered fluid dynamics. The Ag/C and Ag/L samples recorded lower Nusselt numbers than distilled water, aligning with the slight decrement observed in the h exp for the Ag/C and the modest increment for the Ag/L [36].…”

Section: Analysis Of the Heat Transfer Coefficientsupporting

confidence: 75%

Enhancement in Turbulent Convective Heat Transfer Using Silver Nanofluids: Impact of Citrate, Lipoic Acid, and Silica Coatings

Bunpheng,

Dhairiyasamy

2024

ChemEngineering

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This study aims to investigate the thermohydraulic performance of silver nanofluids with different surface modifications (citrate, lipoic acid, and silica) in turbulent convective heat transfer applications. Three silver nanofluids were prepared, each modified with citrate, lipoic acid, or silica coatings. The nanofluids were characterized for stability using zeta potential measurements and evaluated in a smooth brass tube under turbulent flow conditions. The experimental setup involved measuring the temperature, pressure, and flow rate to assess heat transfer coefficients, pressure drops, and friction factors. The results were compared with distilled water as the base fluid and validated against theoretical models. The silica-shelled nanofluid (Ag/S) exhibited a significant 35% increase in the average heat transfer coefficient compared to distilled water, while the citrate-coated (Ag/C) and lipoic acid-coated (Ag/L) nanofluids showed slight decreases of approximately 0.2% and 2%, respectively. The Ag/S nanofluid demonstrated a 9% increase in the mean Nusselt number, indicating enhanced heat transfer capabilities. However, all modified nanofluids experienced higher pressure drops and friction factors than the base fluid, with the Ag/S nanofluid showing the highest increase in viscosity (11.9%). Surface modifications significantly influence the thermohydraulic performance of silver nanofluids. The silica-shelled nanofluid shows the most substantial enhancement in heat transfer, making it a promising candidate for applications requiring efficient thermal management. However, the increased hydraulic costs associated with higher-pressure drops and friction factors must be carefully managed. Further research is needed to optimize these nanofluids for specific industrial applications, considering long-term stability and the effects of different nanoparticle concentrations and geometries.

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Section: Analysis Of the Heat Transfer Coefficientsupporting

confidence: 75%

Enhancement in Turbulent Convective Heat Transfer Using Silver Nanofluids: Impact of Citrate, Lipoic Acid, and Silica Coatings

Bunpheng,

Dhairiyasamy

2024

ChemEngineering

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The volume fraction of nanoparticles and temperature effects on thermal conductivity of SWCNT–Fe3O4–CuO/ethylene glycol–water ternary hybrid nanofluid: experimental, numerical, and statistical investigations

Hemmat Esfe,

Hatami,

Alidoust

et al. 2024

J Therm Anal Calorim

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A detailed thermohydraulic performance assessment of surface-modified silver nanofluids in turbulent convective heat transfer

Bunpheng,

Dhairiyasamy,

Almuflih

et al. 2024

J Therm Anal Calorim

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This study investigates the thermohydraulic performance of surface-modified silver nanofluids in turbulent convective heat transfer applications. The primary objective is to evaluate the impact of citrate, lipoic acid, and silica surface modifications on heat transfer coefficients, pressure drops, and friction factors under turbulent flow conditions. Silver nanoparticles (50 nm) with the specified surface modifications were synthesized and dispersed in deionized water, ensuring stable nanofluid preparations. Experimental evaluations were conducted in a smooth brass tube with a uniform heat flux, covering Reynolds numbers from 3400 to 21,800, mass flow rates of 32 to 78 g s−1, and inlet temperatures of 26 °C, 31 °C, and 36 °C. Key findings indicate that the silica-shelled nanofluid (Ag/S) exhibited a significant 35% increase in the heat transfer coefficient compared to DI water, while citrate-coated (Ag/C) and lipoic acid-coated (Ag/L) nanofluids showed slight decreases of 0.2% and 2%, respectively. The mean Nusselt number for Ag/S also increased by 9%, demonstrating enhanced heat transfer capabilities. Surface-modified nanofluids experienced higher pressure drops and friction factors than the base fluid. Ag/C showed a 7.7% increase in pressure drop, Ag/L a 12.3% increase, and Ag/S a 12.5% increase, correlating with an 11.9% rise in viscosity. While surface-modified silver nanofluids, particularly silica-shelled, can significantly improve heat transfer performance, the associated increases in pressure drops and friction factors must be carefully balanced for specific applications. Future research should explore long-term stability, varying nanoparticle concentrations, and more complex geometries to optimize nanofluid formulations for targeted heat transfer applications.

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Recent advances on entropy analysis of composite nanofluids-A critical review

Cited by 17 publications

References 121 publications

Enhancement in Turbulent Convective Heat Transfer Using Silver Nanofluids: Impact of Citrate, Lipoic Acid, and Silica Coatings

Enhancement in Turbulent Convective Heat Transfer Using Silver Nanofluids: Impact of Citrate, Lipoic Acid, and Silica Coatings

The volume fraction of nanoparticles and temperature effects on thermal conductivity of SWCNT–Fe3O4–CuO/ethylene glycol–water ternary hybrid nanofluid: experimental, numerical, and statistical investigations

A detailed thermohydraulic performance assessment of surface-modified silver nanofluids in turbulent convective heat transfer

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