THE IMBIBITION AND FLOW OF A WETTING LIQUID ALONG THE CORNERS OF A SQUARE CAPILLARY-TUBE
THE IMBIBITION AND FLOW OF A WETTING LIQUID ALONG THE CORNERS OF A SQUARE CAPILLARY-TUBE
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DOI：
10.1006/jcis.1995.1253
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发表时间：
1995-06-15
影响因子：
9.9
通讯作者：
CHATZIS, I
中科院分区：
文献类型：
--
作者：
DONG, M;CHATZIS, I
毛细管角部的无量纲阻力（Ransohoff和Radke， J.胶体界面科学，121,392,1988）被应用于主要由非润湿空气占据的方形毛细管角部的润湿液体的吸吸。本文介绍了在300平方米和500平方米的毛细管中引入湿润流体的段塞吸吸实验结果。使用了五种不同表面张力和粘度值的液体。理论和实验都表明，渗吸速率与（σ /mu）（1/2）成正比。当扩散流体没有完全润湿管壁时，吸胀率大大降低。这主要是由于随着接触角的增加，可用于润湿流体流动的角落的横截面面积变得更小。在方形毛细管中，润湿流体的吸胀速率随毛细管尺寸的减小而减小。理论上，吸胀速度与D-1/2成正比，其中D为管尺寸。(C) 1995学术出版社，Inc。
The dimensionless how resistance in the corners of capillary tubes (Ransohoff and Radke, J. Colloid Interface Sci. 121, 392, 1988), was applied to the imbibition of a wetting liquid in the corners of a square capillary tube occupied predominantly by nonwetting air. Experimental results of imbibition of a slug of a wetting fluid introduced in a 300- and a 500-mu m square capillary tube are presented. Five different liquids with various surface tension and viscosity values were used. It is shown, both theoretically and experimentally, that the imbibition rates are in proportion to the (sigma/mu)(1/2). The imbibition rate decreases greatly when the spreading fluid does not wet perfectly the tube wall. This is mainly due to the cross-section area available for the flow of the wetting fluid in the corners becoming smaller as the contact angle increases. It was also found that the imbibition rate of a wetting fluid in a square capillary tube decreases with decreasing tube size. Theoretically, the imbibition velocity is proportional to D-1/2, where D is the tube size. (C) 1995 Academic Press, Inc.