International audienceWe have developed a microphysical model for Venus’ sulfuric acid clouds. The VenLA cloud model and ref- erence run and sensitivity test results will be presented, with a particular focus on the role of CN. The results will be compared with other modeling studies and ob- servations. The VenLA model defines the baseline for a parallel project on development of a moment method scheme to be used in a global climate model (see abstract Guilbon et al., [2])