The rising behaviors of single bubbles in stagnant turpentine and pine resin solutions
The rising behaviors of single bubbles in stagnant turpentine and pine resin solutions
复制标题
静止松节油和松脂溶液中单个气泡的上升行为
DOI：
10.1016/j.expthermflusci.2018.05.009
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发表时间：
2018-11
影响因子：
3.2
通讯作者：
Liang Jiezhen
中科院分区：
文献类型：
--
作者：
Huang Chengrong;Wang Linlin王琳琳;Chen Xiaopeng;Wei Xiaojie;Liang Jiezhen
采用高速摄影和数字图像分析技术，在25 °C下，观察了直径为0.5 ~ 4.0mm的单气泡在松脂和松脂中的上升特性。尽管松脂在化工等领域有着广泛的应用，但其在气液两相流中的研究还远未得到解决。本文研究了单气泡在松脂和松脂溶液中的运动特性。当气泡直径d ≤ 1 mm时，气泡沿沿着直线上升。随着溶液浓度的增加，轨迹振荡的幅度变小。气泡运动轨迹与液体粘度和气泡直径密切相关。气泡上升速度随气泡尺寸的增大而增大，达到最大值后，随着气泡尺寸的进一步增大，气泡上升速度缓慢下降。测量的单个气泡的上升速度进行了比较与典型的相关性。比较表明，Tomiyama等人（1998）的模型几乎在整个观测范围内都给出了很好的预测，尽管它倾向于稍微高估小气泡的数据。讨论了富山模型的物理性质。
Rise characteristics of single bubbles with diameters ranging from 0.5 to 4.0 mm in turpentine and pine resin were visually observed at 25 °C by the techniques of high-speed photography and digital image analysis. Despite it's widely use in chemical engineering and others, the researches about pine resin on gas-liquid two phase flow is far from being solved. The purpose of the present paper is to assess the moving characteristics of single bubble in turpentine and pine resin solutions. The bubbles rise along a rectilinear path when the diameter d ≤ 1 mm. The amplitude of the trajectory oscillation becomes weaker with the increase of the solution concentration. Bubble trajectory closely related to liquid viscosity and bubble diameter. The bubble rise velocity increased with bubble size to a maximum value, after which the velocity fell slowly with further increases in the bubble size. Measured rising velocities of single bubbles were compared with typical correlations. The comparison showed that the model by Tomiyama et al. (1998) gives a good prediction almost throughout the observed range, though it tends to slightly overestimate the data for small bubbles. The physics of the Tomiyama model were discussed.
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