Study on shrinkage characteristics of heated falling liquid films
Study on shrinkage characteristics of heated falling liquid films
复制标题
加热下降液膜收缩特性研究
作者：
沿加热的固体表面向下沿着流动的液膜可能受到马兰戈尼效应的显著影响，马兰戈尼效应起因于表面张力梯度的存在，该表面张力梯度是由膜的横向方向上的表面温度变化引起的，从而引起膜的明显收缩。本文求解了定表面温度加热平板上层流降膜的控制方程，得到了膜表面温度的分布。通过考虑表面张力梯度和收缩特性的边缘加热膜，收缩模型，给出了膜的界面面积的实验红外图像的基础上推导。模型与实验结果的比较表明，该模型能较好地描述降膜流动特性。该模型可为降膜设备的设计和操作提供参考。© 2005美国化学工程师学会AIChE J，2005
A liquid film flowing down along a heated solid surface may be substantially influenced by the Marangoni effect, which arises from the existence of a surface tension gradient that is induced by the variations of surface temperature in the transverse direction of the film, causing appreciable contraction of the film. In this work, the governing equations for laminar falling liquid films over a heated plate with constant surface temperature were solved and the surface temperature profile of the film was obtained. By considering the surface tension gradient and shrinkage characteristics in the brim of the heated film, a shrinkage model that gives the film interfacial area was derived based on the experimental infrared images. A comparison of the model with experimental data shows that the model can satisfactorily describe the flow characteristics of falling heated films. The model is expected to be useful for the design and operation of falling film equipments. © 2005 American Institute of Chemical Engineers AIChE J, 2005
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影响因子：
4.1
作者：
B. Ramaswamy;S. Krishnamoorthy;S. Joo
通讯作者：
B. Ramaswamy;S. Krishnamoorthy;S. Joo
影响因子：
5.2
作者：
N. Zuber;F. Staub
通讯作者：
N. Zuber;F. Staub
影响因子：
4.5
作者：
O. Kabov;B. Scheid;I. A. Sharina;J. Legros
通讯作者：
O. Kabov;B. Scheid;I. A. Sharina;J. Legros
影响因子：
4.6
作者：
D. Goussis;R. Kelly
通讯作者：
D. Goussis;R. Kelly
影响因子：
3.7
作者：
S. Joo;S. H. Davis;S. Bankoff
通讯作者：
S. Joo;S. H. Davis;S. Bankoff