Dynamics of condensation and evaporation: Effect of inter-drop spacing
Max Planck Institute for Polymer Research - Ackermannweg 10, D-55128 Mainz, Germany, EU
2 Center of Smart Interfaces, Technical University Darmstadt - D-64289 Darmstadt, Germany, EU
Accepted: 21 January 2010
When studying the condensation of vapor to liquid drops on solid hydrophobic surfaces the volume of drops V is found to increase linearly with time, . Constant-contact-angle evaporation studies showed that drop volumes decrease according to . Since both processes are diffusion limited, one would expect the same kinetics. Here, we demonstrate experimentally, theoretically and by finite-element simulations that the spacing between condensing or evaporating drops affects the growth. The volume of single, isolated drops changes according to . For a dense array of drops each individual drop will grow or shrink linearly, .
PACS: 64.70.fm – Thermodynamics studies of evaporation and condensation / 68.03.Fg – Evaporation and condensation of liquids
© EPLA, 2010