Experimental study of alumina-water and zirconia-water nanofluids convective heat transfer and viscous pressure loss in Laminar regime
Author(s)Rea, Ulzie L
Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
Lin-Wen Hu and Jacopo Buongiorno.
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The objective of this study is to evaluate experimentally the convective heat transfer and viscous pressure loss characteristics of alumina-water and zirconia-water nanofluids. Nanofluids are colloidal dispersions of nanoparticles in metal, metal oxide, carbon-based materials in base fluids, and may offer improved heat transfer properties compared with pure base fluids. A flow loop with a vertical heated section was designed and constructed to operate in the laminar flow regime (Re<2000). Initial tests were conducted with deionized water for experiment validation. Alumina nanofluid was tested in the flow loop at four different volumetric loadings, 0.6%, 1%, 3% and 6% and zirconia nanofluid was tested at volumetric loadings of 0.3%, 0.64% and 1.3%. The experimental results, represented in Nusselt number (Nu) and dimensionless length x+, are in good agreement with traditional model predictions if the loading- and temperature- dependent thermophysical properties are utilized. Measured pressure loss of the nanofluid is within 20% of theory. It is concluded that the laminar convective heat transfer and viscous pressure loss behavior of alumina-water and zirconia-water nanofluids can be predicted by existing models as long as the correct mixture properties are used, and there is no abnormal heat transfer enhancement.
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, February 2008."January 2007."Includes bibliographical references (leaves 69-70).
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology