Nodal Boundary Conditions

By default, kinematic constraints act on material velocities and accelerations. In Radioss, you can define a wide variety of such constraints. For multi-physic and fluid applications, options are:

• Fixed and full slip boundary conditions
• Imposed velocities (imposed flux at inlet)
• Rigid links (temporary adds during restarts)
• Rigid bodies to model rigid structures and connections and also to compute drag and lift forces (fluid impulse on rigid body is stored in time history database)

Grid constraints act only on grid velocities. Specify:

• Fixed and full slip grid conditions
• Lagrangian conditions (grid and material velocity are equally set)
• ALE links to maintain regular distribution of nodes
• Imposed grid velocities (moving inlet and outlet)