期刊
THERMAL SCIENCE
卷 25, 期 1, 页码 541-551出版社
VINCA INST NUCLEAR SCI
DOI: 10.2298/TSCI181010414M
关键词
heat transfer enhancement; experimental study; nanofluid; convective heat transfer; twisted tape inserts
This study experimentally examines the heat transfer rate of Al2O3-water nanofluid-flow in a tube with twisted tape inserts, demonstrating the combined effect of nanoparticles and twisted tape inserts on enhancing heat transfer coefficient while influencing pressure drop. The research also explores the influence of nanoparticles' volume fractions in the turbulent regime of a tube with constant temperature boundary condition.
In this study, the heat transfer rate of Al2O3-water nanofluid-flow in a tube with twisted tape inserts is experimentally examined. The twisted tape insert can cause a swirling region in the fluid-flow which will enhance the heat transfer coefficient. On the other hand, the twisted tape inserts have a great influence on the pressure drop. It is known that nanoparticles and twisted tape inserts may both increase the heat transfer rate of the fluid. Thus, in this study, it is tried to demonstrate the combined effect of both phenomena, experimentally. In this way, the Al2O3-water nanofluid is used as the carrier liquid in a tube equipped with various twisted tape inserts of different pitches and twist ratios. Moreover, the influence of nanoparticles' volume fractions was studied in the turbulent regime of a tube with the constant temperature boundary condition.
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