RecurDyn is an interdisciplinary, computer-aided engineering (CAE) software package whose primary function is the simulation of MultiBody Dynamics (MBD). RecurDyn simulates both rigid and flexible body dynamics by combining traditional rigid MBD with cutting-edge finite element technology for modeling flexible bodies. In addition, RecurDyn also includes a tightly-integrated controller design tool, design optimization, particle dynamics for granular materials, and durability and fatigue analysis. RecurDyn also supports co-simulation with various other computer-aided engineering software tools. RecurDyn includes a seamless co-simulation environment for coupled simulations with computational fluid dynamics solver, Particleworks from Promotech, allowing for detailed analysis of the interaction of fluids and multibody systems.