Experimental Study on Forced Convective Heat Transfer with Low Volume Fraction of CuO/Water Nanofluid

Lazarus Godson Asirvatham, Nandigana Vishal, Senthil Kumar Gangatharan and Dhasan Mohan Lal
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Lazarus Godson Asirvatham: Department of Mechanical Engineering, Anna University, Chennai, India
Nandigana Vishal: Department of Mechanical Engineering, Anna University, Chennai, India
Senthil Kumar Gangatharan: Department of Mechanical Engineering, Anna University, Chennai, India
Dhasan Mohan Lal: Department of Mechanical Engineering, Anna University, Chennai, India

Energies, 2009, vol. 2, issue 1, 1-23

Abstract: The present work is an experimental study of steady state convective heat transfer of de-ionized water with a low volume fraction (0.003% by volume) of copper oxide (CuO) nanoparticles dispersed to form a nanofluid that flows through a copper tube. The effect of mass flow rate ranging from (0.0113 kg/s to 0.0139 kg/s) and the effect of inlet temperatures at 10 0 C and 17 0 C on the heat transfer coefficient are studied on the entry region under laminar flow condition. The results have shown 8% enhancement of the convective heat transfer coefficient of the nanofluid even with a low volume concentration of CuO nanoparticles. The heat transfer enhancement was increased considerably as the Reynolds number increased. Possible reasons for the enhancement are discussed. Nanofluid thermo-physical properties and chaotic movement of ultrafine particles which accelerate the energy exchange process are proposed to be the main reasons for the observed heat transfer enhancement. A correlation for convective heat transfer coefficient of nanofluids, based on transport property and D/x for 8 mm tube has been evolved. The correlation predicts variation in the local Nusselt number along the flow direction of the nanofluid. A good agreement (±10%) is seen between the experimental and predicted results.

Keywords: Convective heat transfer; CuO nanofluid; Laminar flow; Nanofluid; Nanoheat transfer; Nanoparticles; Thermal conductivity enhancement (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2009
References: View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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