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An Investigation on the Thermal Effusivity of Nanofluids Containing Al2O3 and CuO Nanoparticles
Department of Physics, University Putra Malaysia, UPM Serdang 43400, Selangor D.E., Malaysia
* Author to whom correspondence should be addressed.
Received: 6 June 2012; in revised form: 28 June 2012 / Accepted: 6 August 2012 / Published: 20 August 2012
Abstract: The thermal effusivity of Al2O3 and CuO nanofluids in different base fluids, i.e., deionized water, ethylene glycol and olive oil were investigated. The nanofluids, nanoparticles dispersed in base fluids; were prepared by mixing Al2O3, CuO nanopowder and the base fluids using sonication with high-powered pulses to ensure a good uniform dispersion of nanoparticles in the base fluids. The morphology of the particles in the base fluids was investigated by transmission electron microscopy (TEM). In this study, a phase frequency scan of the front pyroelectric configuration technique, with a thermally thick PVDF pyroelectric sensor and sample, was used to measure the thermal effusivity of the prepared nanofluids. The experimental results of the thermal effusivity of the studied solvents (deionized water, ethylene glycol and olive oil) showed good agreement with literature values, and were reduced in the presence of nanoparticles. The thermal effusivity of the nanofluid was found to be particularly sensitive to its base fluid and the type of nanoparticles.
Keywords: pyroelectric; thermal diffusivity; nanoparticles; thermal properties
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Noroozi, M.; Zakaria, A.; Moksin, M.M.; Wahab, Z.A. An Investigation on the Thermal Effusivity of Nanofluids Containing Al2O3 and CuO Nanoparticles. Int. J. Mol. Sci. 2012, 13, 10350-10358.
Noroozi M, Zakaria A, Moksin MM, Wahab ZA. An Investigation on the Thermal Effusivity of Nanofluids Containing Al2O3 and CuO Nanoparticles. International Journal of Molecular Sciences. 2012; 13(8):10350-10358.
Noroozi, Monir; Zakaria, Azmi; Moksin, Mohd Maarof; Wahab, Zaidan Abd. 2012. "An Investigation on the Thermal Effusivity of Nanofluids Containing Al2O3 and CuO Nanoparticles." Int. J. Mol. Sci. 13, no. 8: 10350-10358.