The ability to simulate Dynamic Fluid-Body Interaction (DFBI) is a key capability in any simulation package that has benefits in a wide variety of applications and industries. DFBI refers to the interaction between a body and the fluid flow surrounding it and the resulting body motion due to external and flow-induced forces. This enables engineers to easily simulate the fluid induced movement of a body, some key application areas of coupled 6-DOF motion are: Store/stage separation, Missile silo launch, Sea-keeping, Life boat launching, Free-falling objects in air/water, Floating bodies in water.
The driving force behind DFBI simulations in STAR-CCM+ is the Coupled 6-Degrees of Freedom (6-DOF) solver that computes the fluid forces and moments and gravitational forces on a body experiencing fluid-induced motion, which can be used in conjunction with moving or overset mesh. The overset mesh capability allows for a user to easily accommodate complex geometries without needing to worry about the details of cell activation/deactivation or interpolation. The solver also enables multi-body interactions through body-body linear and catenary couplings, in addition to prescription of external forces on the body.