ABSTRACT
This chapter considers kinetics of wetting processes in the case of complete wetting, whereas the B. V. Derjaguin’s pressure includes only one component: the molecular part. It discusses the viscous spreading of drops over solid surfaces in the case of complete wetting. The chapter analyzes how both the Derjaguin’s pressure and the width of the capillary influence the dynamic advancing contact angle of the meniscus of a liquid completely wetting the capillary walls. It also considers the spreading of an axisymmetric liquid drop on a plane solid substrate in the case of complete wetting. If the liquid viscosity over the whole distance to the wall is constant, the slope remains constant until the wetting boundary is reached. In the case of non-Newtonian liquids and the complete wetting case, surface forces in the vicinity of the three-phase contact line can be of a very complex nature.
