Nanofluids heat transfer and flow analysis in vertical spirally coiled tubes using Eulerian two-phase turbulent model

被引：0
|
作者：
P. Naphon
T. Arisariyawong
T. Nualboonrueng
机构：
[1] Srinakharinwirot University,Thermo
[2] National Science and Materials Technology Development Agency,Fluid and Heat Transfer Enhancement Lab. (TFHT), Department of Mechanical Engineering, Faculty of Engineering
来源：
Heat and Mass Transfer | 2017年 / 53卷
关键词：
Heat Transfer; Heat Transfer Coefficient; Nusselt Number; Friction Factor; Secondary Flow;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A computation fluid dynamics study has been performed to analyze the nanofluids heat transfer and flow characteristics in the spirally coiled tubes. Eulerian two-phase turbulent model is applied to simulate the heat transfer and flow characteristics in the vertical spirally coiled tube. The spirally coiled tubes are fabricated by bending a 8.50 mm inner diameter straight copper tube into a spiral-coil with two different curvature ratios of 0.035, 0.060. The predicted results are verified with the present measured data. Reasonable agreement is obtained from the comparison between the measured data and the predicted results. In addition, due to the centrifugal force, the induced secondary flow has significant effect on the heat transfer enhancement as flowing through the spirally coiled tube. Effects of curvature, nanofluids concentration and hot water temperature on the nanofluids heat transfer characteristics and pressure drop are considered.
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页码：2297 / 2308
页数：11
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