Displacement Boundary Conditions

This section summarizes the main displacement boundary conditions currently available in OFFBEAT. Many other boundary conditions (including standard fixedValue and fixedGradient) are available in OpenFOAM and are not treated here. We refer to the OpenFOAM documentation for more information.

Fixed Displacement (Dirichlet) Boundary Conditions

These boundary conditions impose a displacement value (or time series) on a patch.

Available fixed value boundary conditions include:

• fixedDisplacement

Zero Shear (Or Sliding Support) Boundary Conditions

These boundary conditions constrain displacement along certain directions while allowing motion in others, often used to simulate roller-like supports or unilateral contact.

Available options include:

• fixedDisplacementZeroShear
• unilateralContact

Fixed Traction or Fixed Pressure Boundary Conditions

These boundary conditions impose fixed tractions or pressures on a patch.

Available fixed traction boundary conditions include:

• tractionDisplacement
• coolantPressure
• gapPressure
• plenumSpringPressure
• topCladRingPressure
• gapContact
• fixedPointLoad
• fixedTorque

Implicit Contact

These boundary conditions imposes a contact constraint between two bodies in an implicit manner.

Available implicit contact boundary conditions include:

• implicitGapContact