期刊
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
卷 76, 期 -, 页码 171-177出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.icheatmasstransfer.2016.05.029
关键词
Thermal conductivity; Hybrid nanofluid; Empirical correlation; MWCNTs-Fe3O4; Ethylene glycol
In this paper, an experimental study on the effects of temperature and concentration on the thermal conductivity of f-MWCNTs-Fe3O4/EG hybrid nanofluid is presented. The experiments were carried out for solid volume fraction range of 0 to 23% in temperatures ranging from 25 degrees C to 50 degrees C. The results revealed that the thermal conductivity ratio enhances with increasing the solid volume fraction and temperature. Results also showed that, at higher temperatures, the variation of thermal conductivity ratio with solid volume fraction was more than that at lower temperatures. Moreover, the effect of temperature on the thermal conductivity ratio was more noticeable at higher solid volume fractions. The thermal conductivity measurements also showed that the maximum thermal conductivity ratio was 30%, which occurred at temperature of 50 degrees C for solid volume fraction of 2.3%. Finally, for engineering applications, based on experimental results, a precise correlation was suggested to predict the thermal conductivity of f-MWCNTs-Fe3O4/EG hybrid nanofluids. (C) 2016 Elsevier Ltd. All rights reserved.
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