3-D simulation of flow behaviour and film distribution outside a horizontal tube
3-D simulation of flow behaviour and film distribution outside a horizontal tube
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水平管外流动行为和薄膜分布的 3D 模拟
DOI：
10.1016/j.ijheatmasstransfer.2016.11.009
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发表时间：
2017-04
影响因子：
5.2
通讯作者：
Wang Weishu
中科院分区：
文献类型：
--
作者：
Qiu Qinggang;Meng Chuiju;Quan Shenglin;Wang Weishu
降膜特性对传热传质效率有重要影响。因此，研究管周向和轴向的油膜厚度分布具有重要意义。采用三维模型对雷诺数为171 ~ 368的水平管外柱状流降膜流动过程进行了数值模拟。结果表明：在单液柱条件下，沿轴向形成沿着分布的马鞍形液膜，液膜在轴向的延伸距离最大。相反，对于两个相邻的液柱，由于柱之间的相互作用，流动行为改变了很多。两柱之间形成一个波峰，最大油膜厚度是轴向最小油膜厚度的3倍以上。此外，提取液柱的中心部分中的膜厚度。在20° ~ 60°范围内，随着周向角的增大，其值迅速减小。在60-120°范围内变化不大，在120-150°范围内急剧增大。
The behaviour of falling film has significant effects on the efficiency of heat and mass transfer. Therefore it is important to study on the distribution of the film thickness around a tube in both the circumferential and axial directions. A 3-D model was applied in this study to simulate the falling film flow process of a column flow outside a horizontal tube, of which the Reynolds number varied from approximately 171 to 368. The results showed that with a single liquid column, a saddle-shaped spreading liquid lamella was formed along the axial direction, and the maximum elongation distance of the liquid film was obtained in the axial direction. In contrast, with two adjacent liquid columns, the flow behaviour changed a lot due to the interaction between the columns. A crest was formed between the two columns, and the maximum film thickness was more than three times of the minimum in the axial direction. In addition, the film thickness in the central section of the liquid column was extracted. It rapidly decreased as the circumferential angle varied from 20° to 60°. Then it changed little in the range of 60–120°, and sharply increased in the range of 120–150°.
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影响因子：
--
作者：
Xiaofei Wang;P. Hrnjak;S. Elbel;A. Jacobi;M. He
通讯作者：
Xiaofei Wang;P. Hrnjak;S. Elbel;A. Jacobi;M. He
影响因子：
--
作者：
M. Chyu;A. Bergles
通讯作者：
M. Chyu;A. Bergles
影响因子：
6.4
作者：
M. Fiorentino;G. Starace
通讯作者：
M. Fiorentino;G. Starace
DOI：
10.1016/j.ijrefrig.2009.02.008
发表时间：
2009-06
期刊：
International Journal of Refrigeration-revue Internationale Du Froid
影响因子：
--
作者：
V. Subramaniam;S. Garimella
通讯作者：
V. Subramaniam;S. Garimella
DOI：
--
发表时间：
--
期刊：
--
影响因子：
--
作者：
W. Nusselt
通讯作者：
W. Nusselt