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Al2O3-based nanofluids: a review.

Veeranna Sridhara¹, Lakshmi Narayan Satapathy

¹Ceramic Technological Institute, BHEL, Malleswaram Complex, Bangalore 560012, India. satpathy@bhelepd.com.

Nanoscale Research Letters

|July 19, 2011

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Alumina (Al2O3) nanofluids significantly enhance thermal conductivity for industrial cooling. This review covers stability, viscosity, and heat transfer improvements, with conductivity boosts ranging from 2% to 36%.

Area of Science:

Materials Science
Chemical Engineering
Thermodynamics

Background:

Ultrahigh performance cooling is crucial for many industries, but limited thermal conductivity of conventional fluids hinders efficiency.
Nanofluids, engineered by dispersing nanoparticles in base fluids, offer enhanced thermal properties.
Alumina-based nanofluids are a key area of research for advanced heat transfer applications.

Purpose of the Study:

To review recent advancements in alumina (Al2O3)-based nanofluids.
To summarize findings on nanofluid stability, thermal conductivity enhancement, viscosity, and heat transfer characteristics.
To highlight the potential of Al2O3 nanoparticles in improving heat transfer fluid performance.

Main Methods:

Literature review of experimental studies on alumina-based nanofluids.

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Analysis of data concerning nanoparticle size, stability, thermal conductivity, viscosity, and heat transfer.

Synthesis and characterization of alumina nanoparticles (13-302 nm) for nanofluid preparation.

Main Results:

Alumina-based nanofluids demonstrate significantly higher thermal conductivities compared to base fluids.
Observed thermal conductivity enhancements in alumina-based nanofluids range from 2% to 36%.
Nanoparticle size and dispersion influence the stability and thermophysical properties of the nanofluids.

Conclusions:

Alumina-based nanofluids show considerable promise for improving the efficiency of cooling systems.
Further research into nanofluid stability and optimization is essential for industrial adoption.
Alumina nanoparticles offer a viable route to developing superior heat transfer fluids.