Journal
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
Volume 66, Issue 6, Pages 646-668Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10407782.2014.894389
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Funding
- National Natural Science Foundation of China [51376002, 51276031, 51006015]
- Fundamental Research Funds for the Central Universities [DUT14QY23]
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Turbulent flow characteristic of TiO2-water nanofluids inside a horizontal circular tube is studied numerically by single-phase model, mixture multiphase model and Eulerian-Eulerian multiphase model. The flow characteristic is accounted from micro-flow aspect in order to reveal the mechanism of heat transfer enhancement in nanofluids. A new empirical correlation of nanoparticle viscosity has been proposed for multiphase models, which is much more precise than traditional empirical models. The presence of nanoparticles intensified local micro-flow and improved overall turbulence intensity significantly. The current study suggests that a thorough understanding on flow characteristics of nanofluids is essential for proposing mathematical description nanofluids flow.
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