Mesoscopic modelling of droplets on topologically patterned substrates

Abstract

We present a lattice Boltzmann model to describe the spreading of droplets on topologically patterned substrates. We apply it to model superhydrophobic behaviour on surfaces covered by an array of micron-scale posts. We find that the patterning results in a substantial increase in contact angle, from $110^o$ to $156^o$.

10 pages, 4 figures, to be presented at the ICCS2004 Workshop on Multi-Physics Multi-Scale Simulation