Abstract
The heat transfer coefficient of a nanofluid in a cylindrical channel under constant heat flux density at the walls is measured experimentally. The studied fluid was prepared based on distilled water and CuO nanoparticles with an average size of 55 nm. To stabilize the nanofluid, a biopolymer was used. The volume concentration of nanoparticles was in the range from 0.25 to 2%. It is shown that the nanofluid is Newtonian at the lowest concentration of nanoparticles, and in all other cases, its rheology is described well by the model of a power-law fluid. A correlation of the dependence of the parameters of this model on the concentration of nanoparticles is obtained. It is found that the presence of nanoparticles greatly intensifies the heat transfer.
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Original Russian Text © A.V. Minakov, V.Ya. Rudyak, D.V. Guzei, A.S. Lobasov, 2015, published in Teplofizika Vysokikh Temperatur, 2015, Vol. 53, No. 2, pp. 256–263.
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Minakov, A.V., Rudyak, V.Y., Guzei, D.V. et al. Measurement of the heat transfer coefficient of a nanofluid based on water and copper oxide particles in a cylindrical channel. High Temp 53, 246–253 (2015). https://doi.org/10.1134/S0018151X15020169
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DOI: https://doi.org/10.1134/S0018151X15020169