Quasi-logarithmic spacing law in dewetting patterns from the drying   meniscus of a polymer solution
  We report on a periodic precipitation pattern emerged from a drying meniscus via evaporation of a polystyrene solution in a Petri dish. It appeared a quasi-logarithmic spacing relation in the pattern as a result of stick-slip motion of the contact line towards the wall. A model based on the dynamics of the evaporating meniscus is proposed. 
Yong-Jun Chen, Kosuke Suzuki, Hitoshi Mahara, Tomohiko Yamaguchi
physics.chem-ph cond-mat.soft physics.flu-dyn