Description of Dynamic Contact Angle on a Rough Solid Surface
Description of Dynamic Contact Angle on a Rough Solid Surface
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DOI：
10.1115/ht2003-47470
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
X. Peng;X. D. Wang;D. J. Lee
中科院分区：
文献类型：
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作者：
X. Peng;X. D. Wang;D. J. Lee
进行了一项调查以了解接触线运动和相关的接触角现象。接触线被认为是由于固体和液体之间的分子相互作用以及固体表面的粗糙度而在薄的前体薄膜上移动。预计接触线具有一定的速度，并且会受到薄膜上或固体表面上的几何粘性应力。通过引入特征参数 λ′，接触线的运动和接触角现象在物理和数学上得到了很好的描述。推导了液体对固体表面施加的粘性剪切应力，并认识到粗糙固体表面上的动态接触角行为。分析表明，特征参数 λ' 取决于固体壁的固有特性和机械性能，而不是液体特性。理论预测与公开文献中可用实验数据的比较表明彼此非常一致。版权所有 © 2003 by ASME
An investigation was conducted to understand the contact line movement and associated contact angle phenomena. Contact line was supposed to move on a thin precursor film caused by molecular interaction between solid and liquid and asperity of solid surface. It is expected that contact line has a velocity and is subject to viscous stress on the film or geometrically on the solid surface. With the introduction of a characteristic parameter, λ′, the movement of contact line and contact angle phenomena were very well described in both physics and mathematics. The viscous shearing stress exerted by liquid on solid surface was derived, and the behavior of dynamic contact angle was recognized on rough solid surfaces. The analyses indicate that characteristic parameter, λ′, is dependent upon solid wall intrinsic property and mechanical performance, not liquid property. The comparison of theoretical predictions with available experimental data in open literature showed a quite good agreement with each other.Copyright © 2003 by ASME