/INTER/TYPE1

Block Format Keyword ALE boundary nodes can be tied to Lagrangian surface to achieve an interaction between fluid and structure.

This way Lagrangian surface is acting as a sliding wall boundary condition. It is compatible for both 2D and 3D analysis.
Figure 1.


Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/INTER/TYPE1/inter_ID
inter_title
surf_IDA surf_IDL

Definition

Field Contents SI Unit Example
inter_ID Interface identifier.

(Integer, maximum 10 digits)
inter_title Interface title.

(Character, maximum 100 characters)
surf_IDA ALE surface identifier.

(Integer)
surf_IDL Lagrangian surface identifier.

(Integer)

Comments

  1. This interface is not compatible when the Lagrangian surface is in a rigid body.
  2. The Lagrangian surface normals do not need to be oriented in a specific direction.
  3. A small gap (positive or negative) is acceptable between the surfaces.
  4. The Lagrangian surface cannot be immersed inside the fluid domain. It should always be a boundary surface.
    Figure 2.


  5. The Lagrangian surface must be connected (no free edges).
    Figure 3.


  6. The interface models a sliding condition imposed by the Lagrange structure.
    Figure 4.