Open Access Nano Express

Specific heat capacity of molten salt-based alumina nanofluid

Ming-Chang Lu* and Chien-Hsun Huang

Author affiliations

Department of Mechanical Engineering, National Chiao Tung University, 1001 University Road, Hsinchu 30010, Taiwan

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Citation and License

Nanoscale Research Letters 2013, 8:292  doi:10.1186/1556-276X-8-292

Published: 21 June 2013

Abstract

There is no consensus on the effect of nanoparticle (NP) addition on the specific heat capacity (SHC) of fluids. In addition, the predictions from the existing model have a large discrepancy from the measured SHCs in nanofluids. We show that the SHC of the molten salt-based alumina nanofluid decreases with reducing particle size and increasing particle concentration. The NP size-dependent SHC is resulted from an augmentation of the nanolayer effect as particle size reduces. A model considering the nanolayer effect which supports the experimental results was proposed.

Keywords:
Nanofluid; Nanolayer; Specific heat capacity (SHC); Molten-salt