Cavitation is a main concern in hydraulic pumps, since it’s associated with decreased performance and components erosion, which could eventually lead to the complete failure of the machine. Many commercial computational fluid dynamics (CFD) solvers can model and predict cavitation phenomena in hydraulic pumps, and some also allow to obtain an estimate of the associated wall damage. What such models are lacking tough is the possibility to automatically modify the geometry of the fluid domain to mimic the progressive material removal on the walls. This feature could improve the prediction of the pump behaviour after the first occurrence of wall erosion, as well as forecast the useful life of the components and help in making design modification to extend it.