外形分析-拟合求导法测接触角  

CONTACT ANGLE MEASUREMENT WITH SHAPE FIT-DIFFERENTIAL METHOD

作　　者：林志勇[1] 王晓东[1] 彭晓峰[1] 

机构地区：[1]相变与界面传递现象实验室,清华大学热能工程系北京100084

出　　处：《工程热物理学报》2005年第5期847-849,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金青年基金资助项目(No.50406001)

摘　　要：在外界来流作用下,液滴在固体表面上呈现周期性振荡特性,接触角的动态变化是表征该过程特性的重要参数, 传统方法不适用此接触角测量。在分析常用接触角测量方法的基础上,提出外形分析-拟合求导法测量动态接触角,同经典测量方法对比表明,外形分析-拟合求导法可很好地满足测量精度要求。Liquid droplets could periodically oscillate on the solid surface under the air flow, which is described by the performance of dynamic contact angle. However, the traditional experimental technologies are not applicable for this kind of dynamical contact angle measurement. With improvement of normal measurement methods, a new technology, termed as shape-fit differential method, is proposed to measure the contact angle in the oscillation process. The experiments demonstrate that this method meets the precision demand very well.

关 键 词：振荡 液滴 外形分析-拟合求导法 接触角 测量 

分 类 号：TK124[动力工程及工程热物理—工程热物理]