Characteristics of turbulent forced convective nanofluid flow and heat transfer in a 2D axisymmetric corrugated pipe

Shuvo, Md Shahneoug; Ruvo, Tahmidul Haque; Saha, Sumon

doi:10.1016/j.tsep.2023.101838

Cited by 5 publications

(1 citation statement)

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“…Investigate convective nanofluid flow in a corrugated pipe Al 2 O 3 /water nanofluids Highest thermal efficiency at corrugation height of 0.0318D with 2% volume fraction. Detailed flow and heat transfer profiles were analyzed [28].…”

Section: Study Forced Convection In Automotive Radiatorsmentioning

confidence: 99%

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: Study Forced Convection In Automotive Radiatorsmentioning

confidence: 99%