当前位置: X-MOL 学术Int. J. Multiphase Flow › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The falling, necking, and break-up of droplet between horizontal tubes with low Reynolds number
International Journal of Multiphase Flow ( IF 3.8 ) Pub Date : 2021-06-05 , DOI: 10.1016/j.ijmultiphaseflow.2021.103717
Shanlin Liu , Gangtao Liang , Chao Li , Liuyang Zhang , Jinhui Che , Shengqiang Shen

Experimental observations and measurements concerning falling, necking, and break-up characteristics of a single droplet from a horizontal tube to the adjacent tube are performed using a high-speed digital camera. The droplet flow with a low Reynolds number at several tube-spacing are adopted in experiments. The morphological changes of droplet flow are presented in detail. With the increase of tube spacing, the droplet flow states of undeveloped droplet flow, pendant droplet flow, and complete droplet flow are presented successively between tubes. In addition, quantitative analyses about the necking process under different flow rates and tube diameters are discussed. The results show that the necking process can be divided into a linear necking region and a exponential necking region. In the linear necking region, the tube diameter has minor effect on the necking process, but the increase of flow rate makes the linear necking duration longer. In the exponential necking region, the initial conditions, such as tube diameter and flow rate, have no significant effect on the necking process. Moreover, the formation and evolution of satellite droplets are discussed in detail. For the complete droplet flow, the overhanging column breaks into several satellite droplets. The volume together with surface area of the detached droplet and satellite droplets are measured as well. The results show that the detached droplet plays a major role in the droplet flow, carrying most of liquid in the falling droplet. The effect of satellite droplets is mainly reflected in the first and second satellite droplets.



中文翻译:

低雷诺数水平管之间液滴的下落、颈缩和破裂

使用高速数码相机进行关于从水平管到相邻管的单个液滴的下落、颈缩和破裂特性的实验观察和测量。实验中采用了在几个管间距下具有低雷诺数的液滴流动。详细介绍了液滴流动的形态变化。随着管间距的增加,管间依次呈现不发达液滴流、悬垂液滴流和完全液滴流的液滴流动状态。此外,还讨论了不同流速和管径下缩颈过程的定量分析。结果表明,颈缩过程可分为线性颈缩区和指数颈缩区。在线性颈缩区,管径对颈缩过程的影响较小,但流量的增加使线性颈缩持续时间更长。在指数颈缩区,初始条件,如管径和流速,对颈缩过程没有显着影响。此外,详细讨论了卫星液滴的形成和演化。对于完整的液滴流,悬垂的柱子分解成几个卫星液滴。体积以及分离液滴和卫星液滴的表面积也被测量。结果表明,分离的液滴在液滴流动中起主要作用,在下落的液滴中携带大部分液体。卫星液滴的作用主要体现在第一和第二卫星液滴上。但流量的增加使线性缩颈持续时间更长。在指数颈缩区,初始条件,如管径和流速,对颈缩过程没有显着影响。此外,详细讨论了卫星液滴的形成和演化。对于完整的液滴流,悬垂的柱子分解成几个卫星液滴。体积以及分离的液滴和卫星液滴的表面积也被测量。结果表明,分离的液滴在液滴流动中起主要作用,在下落的液滴中携带大部分液体。卫星液滴的作用主要体现在第一和第二卫星液滴上。但流量的增加使得线性缩颈持续时间更长。在指数颈缩区,初始条件,如管径和流速,对颈缩过程没有显着影响。此外,详细讨论了卫星液滴的形成和演化。对于完整的液滴流,悬垂的柱子分解成几个卫星液滴。体积以及分离液滴和卫星液滴的表面积也被测量。结果表明,分离的液滴在液滴流动中起主要作用,在下落的液滴中携带大部分液体。卫星液滴的作用主要体现在第一和第二卫星液滴上。对颈缩过程没有显着影响。此外,详细讨论了卫星液滴的形成和演化。对于完整的液滴流,悬垂的柱子分解成几个卫星液滴。体积以及分离液滴和卫星液滴的表面积也被测量。结果表明,分离的液滴在液滴流动中起主要作用,在下落的液滴中携带大部分液体。卫星液滴的作用主要体现在第一和第二卫星液滴上。对颈缩过程没有显着影响。此外,详细讨论了卫星液滴的形成和演化。对于完整的液滴流,悬垂的柱子分解成几个卫星液滴。体积以及分离液滴和卫星液滴的表面积也被测量。结果表明,分离的液滴在液滴流动中起主要作用,在下落的液滴中携带大部分液体。卫星液滴的作用主要体现在第一和第二卫星液滴上。体积以及分离液滴和卫星液滴的表面积也被测量。结果表明,分离的液滴在液滴流动中起主要作用,在下落的液滴中携带大部分液体。卫星液滴的作用主要体现在第一和第二卫星液滴上。体积以及分离液滴和卫星液滴的表面积也被测量。结果表明,分离的液滴在液滴流动中起主要作用,在下落的液滴中携带大部分液体。卫星液滴的作用主要体现在第一和第二卫星液滴上。

更新日期:2021-06-22
down
wechat
bug