The reactive surface tension model was proposed by Clavin et al. [25] and it involves particles changing from one particle type to the other if they cross the boundary between fluids. This is done by allowing the reactions
and
at every site containing three particles. Here R and B represent a red
and a blue particle respectively. On average the same number of
each interaction should take place and so the total number of particles of each
colour should be conserved. Other than this reaction the particles
interact according to the normal FHP rules. The coloured particle being
assigned randomly amongst the out-state configuration after the collision.