Cube-it Boundary Conditions

In Cube-it, boundary conditions are applied to sidesets or nodesets.  Sidesets and nodesets can contain geometry or mesh.  This means that models can be remeshed without worrying about losing boundary condition data if the boundary condition is applied to a geometry-based sideset/nodeset.

The sideset/nodeset used by a boundary condition will be visible to the user, and the user can modify the sideset/nodeset separately from the boundary condition.  Sidesets/nodesets can be assigned to (or removed from) a boundary condition at any time.

Boundary conditions are broken into four groups: Restraints, loads, contact, and cfd. Each restraint that is created will belong to a restraint set, each load will belong to a load set, and each contact definition will belong to a contact set. A boundary condition set consists of any number of restraints, contact pairs, and loads. CFD boundary conditions do not belong to boundary condition sets.

Table 1: Overview of boundary condition entities available in Cube-it

Entity Description and scope

FEA Boundary Conditions

Acceleration Creates an acceleration boundary condition (acts on a body, volume, surface, curve, or vertex)
Velocity Creates a velocity boundary condition (acts on a body, volume, surface, curve, or vertex)
Boundary Condition Set Creates a BC set (contains restraint, load and contact sets)
Contact Region Creates a contact region between two surfaces or two curves
Contact Pair Creates a contact pair between two previously defined contact regions
Convection Creates a convection boundary condition (acts on 2d elements)
Displacement Creates a displacement boundary condition (acts on a body, volume, surface, curve or vertex)
Temperature Create a temperature boundary condition (acts on a surface, curve or vertex)
Force Creates a force boundary condition (acts on a surface, curve or vertex)
Pressure Creates a pressure boundary condition (acts on a surface or curve)
Heat flux Creates a heat flux boundary condition (acts on a surface or curve)

CFD Boundary Conditions

Inlet Velocity Creates an inlet velocity boundary condition
Inlet Pressure Creates an inlet pressure boundary condition
Inlet Massflow Creates an inlet massflow boundary condition
Outlet Pressure Creates an outlet pressure boundary condition
Farfield Pressure Creates a farfield pressure boundary condition
Axis Creates an axis boundary condition
Exhaust Fan Creates an exhaust fan boundary condition

Fan

Creates an fan boundary condition
Inlet Vent Creates an inlet vent boundary condition
Intake Fan Creates an intake fan boundary condition
Interface Creates an interface boundary condition
Interior Creates an interior boundary condition
Mass Flow Inlet Creates an mass flow inlet boundary condition
Outflow Creates an outflow boundary condition
Outlet Vent Creates an outlet vent boundary condition
Periodic Creates an periodic boundary condition
Periodic Shadow Creates an periodic shadow boundary condition
Porous Jump Creates an porous jump boundary condition
Radiator Creates an radiator boundary condition
Symmetry Creates a symmetry boundary condition (acts on a surface)
Wall Creates an wall boundary condition