Journal
MEASUREMENT
Volume 46, Issue 10, Pages 4321-4327Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2013.07.043
Keywords
Thermal diffusivity; Photoflash technique; Gold nanofluids; Laser ablation
Funding
- Malaysian Government through RU
- Malaysian Government through FRGS
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In this paper, the application of photoflash technique to measuring the thermal diffusivity of gold nanofluids of very low concentration at room temperature was presented. The nanofluid samples were prepared from the pulse laser ablation procedure. The thermal diffusivity was obtained by fitting the theoretical temperature signal to the experimental data, and it was found to increase linearly from 1.47 x 10 (3) cm(2) s (1) to 1.68 x 10 (3) cm(2) s (1) as the concentration increased from 1.11 mg/L to 3.18 mg/L. The increase in thermal diffusivity in these multidispersed nanofluids was attributed to the higher nanoparticle concentration as well as to the increasing presence of the smaller size nanoparticles. (C) 2013 Elsevier Ltd. All rights reserved.
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