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Thermophysical property-related comparison criteria for nanofluid heat transfer enhancement in turbulent flow

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5 Author(s)
Yu, W. ; Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA ; France, D.M. ; Timofeeva, E.V. ; Singh, D.
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Heat transfer enhancement criteria for nanofluids over their base fluids are presented based on three separate considerations: Reynolds number, flow velocity, and pumping power. Analyses presented show that, among the three comparisons, the constant pumping power comparison is the most unambiguous; the constant flow velocity comparison can be quite reasonable under certain conditions but the constant Reynolds number comparison (the most commonly used in the engineering literature for nanofluids) distorts the physical situation, and therefore, should not be used.

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Applied Physics Letters  (Volume:96 ,  Issue: 21 )