Title: Pattern formation in coating flows of suspensions

Author (Talk): Justin Kao, MIT

Abstract:

We investigate Landau-Levich coating of a solid wall by a suspension of spherical particles. When the suspended particle size exceeds the liquid film thickness, capillarity attraction results in particle aggregation and pattern formation. We observe two regimes of coating behavior and measure coating fraction as a function of wall speed and bulk volume fraction. We propose a continuum Cahn-Hilliard model for this behavior by analogy to the spinodal decomposition of binary mixtures.