Copper nanoparticles with an average size of 10 nm are prepared by the sputtering method and are characterized using different techniques, viz., X-ray diffraction spectrum, atomic force microscopy, and transmission electron microscopy. The pool boiling heat transfer characteristics of 0.25%, 0.5%, and 1.0% by weight concentrations of copper nanoparticles dispersed in distilled water and in distilled water with of sodium dodecyl sulfate (SDS) are studied. Also the data for the boiling of pure distilled water and water with SDS are acquired. The above data are obtained using commercial seamless stainless steel tube heater with an outer diameter of 9.0 mm and an average surface roughness of . The experimental results concluded that (i) critical heat flux (CHF) obtained in water with surfactant nanofluids gives nearly one-third of the CHF obtained by copper-water nanofluids, (ii) pool boiling heat transfer coefficient decreases with the increase in the concentration of nanoparticles in water base fluids, and (iii) heat transfer coefficient increases with the addition of 9.0% surfactant in water. Further addition of nanoparticles in this mixture reduces the heat transfer coefficient. (iv) CHF increases nearly 50% with an increase in concentration of nanoparticles in the water as base fluid and nearly 60% in the water with surfactant as base fluid.
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Research Papers
Characterization and Pool Boiling Heat Transfer Studies of Nanofluids
R. Kathiravan,
R. Kathiravan
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology
, Roorkee 247 667, India
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Ravi Kumar,
Ravi Kumar
Department of Mechanical and Industrial Engineering,
e-mail: ravikfme@iitr.ernet.in
Indian Institute of Technology
, Roorkee 247 667, India
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Akhilesh Gupta,
Akhilesh Gupta
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology
, Roorkee 247 667, India
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Ramesh Chandra
Ramesh Chandra
Institute Instrumentation Centre,
Indian Institute of Technology
, Roorkee 247 667, India
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R. Kathiravan
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology
, Roorkee 247 667, India
Ravi Kumar
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology
, Roorkee 247 667, Indiae-mail: ravikfme@iitr.ernet.in
Akhilesh Gupta
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology
, Roorkee 247 667, India
Ramesh Chandra
Institute Instrumentation Centre,
Indian Institute of Technology
, Roorkee 247 667, IndiaJ. Heat Transfer. Aug 2009, 131(8): 081902 (8 pages)
Published Online: June 5, 2009
Article history
Received:
October 6, 2008
Revised:
March 4, 2009
Published:
June 5, 2009
Citation
Kathiravan, R., Kumar, R., Gupta, A., and Chandra, R. (June 5, 2009). "Characterization and Pool Boiling Heat Transfer Studies of Nanofluids." ASME. J. Heat Transfer. August 2009; 131(8): 081902. https://doi.org/10.1115/1.3111260
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