期刊
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
卷 71, 期 -, 页码 163-171出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2013.04.003
关键词
CFD; Two-phase model; Hybrid/combined nanofluids; Non-Newtonian fluid; CNTs
资金
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2011-0009022]
- National Research Foundation of Korea [2011-0009022] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Two-phase mixture model has been chosen to study forced convective heat transfer of nanofluid introducing a new concept of heat transfer enhancement in this article. Two different base fluids are individually employed to investigate the effect of base fluids on convective heat transfer mixing Al2O3 nanoparticles. The computational method has been successfully validated in case of Al2O3/water Nanofluids using available experimental data reported in the literature. The results show that Ethylene Glycol base fluid gives better heat transfer enhancement than that of water. Mixture of Al2O3 nanoparticles into CNTs/water Nanofluids is considered as a new concept of combined/hybrid nanofluids that can successfully enhance convective heat transfer. The computational model for CNTs/water nanofluid has been validated comparing the results with experimental data reported in literature. Then the validated method was used to simulate new concept of combined nanofluids. Combination of CNTs and Al2O3 nanoparticles into water base fluid tends to enhance the convective heat transfer performance significantly. It happens because CNTs nanofluid shows higher shear thinning behavior which causes the boundary layer thinner; in these regions the significant convective heat transfer enhancement takes place. (C) 2013 Elsevier Masson SAS. All rights reserved.
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