Dynamic Wetting and Dewetting: Comparison of Experiment with Theories

Abstract

Abstract. The dynamics wetting/dewetting of a metal surface by distilled water drop was studied experimentally. The advancing and receding dynamic contact angles were obtained as a function of a contact line speed. The hydrodynamic and molecular-kinetic models have been applied to the experimental data to interpret the obtained results. The independent variables of the molecular-kinetic and hydrodynamic models, and the determination coefficient were determined by fitting procedure. The receding contact angles are found to be fitted better to the wetting models in comparison with the advancing dynamic contact angles.

Mechanism of Contact Line Movement of a Droplet Spreading Over a Solid Surface

“…The principle of operation is described in detailed in [21][22][23][24][25]. To form advancing and receding contact line, liquid was pumped in/out through an opening in the surface (Fig.1) Fig.…”

Measurement of free surface energy of laser treated aluminum substrate

“…The most of known methods both improving and deteriorating wettability of various materials [1][2][3] have a disadvantage. It is a limited period of use after which the surface acquires the initial wettability properties.…”