The design of efficient gas liquid separation units for natural gas production lines depends on the accurate estimation of the droplet size distribution. The droplet size can be estimated by considering breakage and coalescence phenomena. In particular, off-shore separation units working at high pressure (100-200 bar) require, special consideration of coalescence processes with multiple outcomes. This work discusses the introduction of multiple outcomes in the coalescence process. Numerical experiments are presented in order to highlight the effect of multiple coalescence behavior in the evolution of the droplet size distribution. (c) 2008 Elsevier Ltd. All rights reserved.