The effect of nanoparticle size on thermal diffusivity of gold nano-fluid measured using thermal lens technique

resumo

A dual beam mode-mismatched thermal lens method has been employed to investigate the dependence of thermal diffusivity of gold nanofluid on nanoparticles sizes. The samples were prepared at various sizes by utilizing the gamma radiation method. In the dual beam mode-mismatched thermal lens a diode laser (532 nm) was used as an excitation beam and a He-Ne laser with the beam output at 632.8 nm was used as a probe beam. Thermal diffusivity of gold nano-fluid increased with the increasing particle sizes ranging from 10.4 to 29.6 nm. [DOI: http://dx.doi.org/10.2971/jeos.2013.13026]

palavras-chave

HEAT-TRANSFER; NANOFLUIDS; LASER; MODEL; CONDUCTIVITY; SPECTROMETRY; SAMPLES

categoria

Optics

autores

Shahriari, E; Yunus, WMM; Zamiri, R

nossos autores

Grupos

agradecimentos

We gratefully acknowledge the Department of Physics, UPM for providing the research facilities to enable us to carry out this research. One of the authors (W. M. Mat Yunus) would also like to acknowledge the MOSTI for the financial support through Fundamental research grant (01-11-08-664FR/5523664).

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