期刊
HEAT TRANSFER RESEARCH
卷 49, 期 5, 页码 439-456出版社
BEGELL HOUSE INC
DOI: 10.1615/HeatTransRes.2018015783
关键词
Nusselt number; friction factor; titanium oxide/water nanofluid; conical strip
The heat transfer characteristics of a horizontal circular tube in a transition regime with conical strip inserts are determined experimentally. A water-based titanium oxide nanofluid was employed as a heat transfer fluid and was prepared using a two-step method with the volume concentration of 0.1 vol.% and 0.5 vol.%. Staggered and non-staggered conical strips having three different twist ratios are employed. It was observed that the heat transfer performance of the nanofluids increases with the particle volume fraction. Moreover, the heat transfer performance increased enormously with the use of conical strip inserts in comparison with a plain tube. It was also observed that the strip geometry and nanofluid had a major effect on the thermal performance of the circular tube. The maximum Nusselt number was achieved using the staggered type of strips for both forward and backward directions at the Reynolds number 5790.3 with 0.5 vol.% concentration and at a twist ratio of 5 of a conical strip insert.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据