Study of the enhanced thermal conductivity of Fe nanofluids

✍ Scribed by Hong, Tae-Keun; Yang, Ho-Soon; Choi, C. J.

• Book ID: 120239681
• Publisher: American Institute of Physics
• Year: 2005
• Tongue: English
• Weight: 377 KB
• Volume: 97
• Category: Article
• ISSN: 0021-8979
• DOI: 10.1063/1.1861145

✦ Synopsis

Nanofluids, a mixture of nanoparticles and fluid, have enormous potential to improve the efficiency of heat transfer fluids. Fe nanofluids are prepared with ethylene glycol and Fe nanocrystalline powder synthesized by a chemical vapor condensation process. Sonication with high-powered pulses is used to improve the dispersion of nanoparticles in the preparation of nanofluids. Nanofluids exhibit an enhancement of thermal conductivity after sonication. Thermal conductivity of a Fe nanofluid is increased nonlinearly up to 18% as the volume fraction of particles is increased up to 0.55 vol. %. Comparing Fe nanofluids with Cu nanofluids, we find that the suspension of highly thermally conductive materials is not always effective to improve thermal transport property of nanofluids.