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3.13.8 Tied Multiphasic Interfaces
A tied multiphasic interface is similar to the tied biphasic interface. It may be used for tying any combination of solid, biphasic, multiphasic and rigid materials. It enforces continuity of the effective fluid pressure and effective solute concentrations across the interface when both materials are biphasic or multiphasic. The following control parameters need to be defined:
Parameter | Description | Default |
penalty | normal penalty scale factor (1) | 1.0 |
pressure_penalty | pressure penalty scale factor | 1.0 |
concentration_penalty | concentration penalty scale factor | 1.0 |
auto_penalty | auto-penalty calculation flag (2) | 0 |
update_penalty | update auto-penalty calculation flag (2) | 0 |
two_pass | two-pass flag (3) | 0 |
laugon | augmented Lagrangian flag (4) | 0 |
tolerance | aug. Lagrangian convergence tolerance (4) | 1.0 |
gaptol | tolerance for gap value (4) | 0.0 (off) |
symmetric_stiffness | symmetric stiffness matrix flag (7) | 0 |
search_tol | Projection search tolerance (8) | 0.01 |
search_radius | search radius (10) | 1.0 |