/INTER/TYPE22

Block Format Keyword This interface uses a cartesian cut cell method to model the fluid structure interaction between a Lagrangian surface and a fluid domain.

Important: This interface is currently in the beta release state as development continues.
This interface defines a cartesian cut cell method for FSI between a Lagrangian surface and a fluid domain. This coupling interface was designed for ditching applications and currently requires a smooth structural Lagrangian surface. Unlike /INTER/TYPE18 penalty based FSI contact, the cut method used in this interface has no numerical parameter to defines. Parallel processing is only supported via SMP and not SMPD.


Figure 1.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/INTER/TYPE22/inter_ID/unit_ID
inter_title
grbric_ID surf_ID                
Blank

Definition

Field Contents SI Unit Example
inter_ID Interface identifier.

(Integer, maximum 10 digits)

  
unit_ID Optional unit identifier.

(Integer, maximum 10 digits)

  
inter_title Interface title.

(Character, maximum 100 characters)

  
grbric_ID Fluid domain group identifier.

(Integer)

  
surf_ID Lagrangian surface identifier. 3

(Integer)

  

Comments

  1. This coupling interface utilizes a Finite Volume Method for the fluid domain.
  2. Boundary conditions are automatically defined as sliding wall conditions.
  3. Nodal output is no longer relevant so element output should be used instead:

    See /ANIM/BRICK/VEL, /ANIM/BRICK/FIN, /ANIM/BRICK/MOM ( ρ U MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqGqFfpeea0xe9vq=Jb9 vqpeea0xd9q8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr 0=vr0db8meaabaqaciGacaGaaeqabaWaaeaaeaaakeaacqaHbpGCca WHvbaaaa@3A06@ ) or /H3D/SOLID/VEL, /H3D/SOLID/FIN, /H3D/SOLID/MOM output velocity vectors at cell centroids using h3d output files and /H3D/SOLID/VECT/VEL.

  4. The Lagrangian surface must be smooth enough.
  5. Current limitations:
    • Only 8 nodes bricks (/BRICK) can be used for EULER mesh
    • Only 1 domain only can be used for SPMD
    • Only fluid materials are LAW3, LAW4, LAW6, LAW37, and LAW51
    • Viscosity cannot be used so λ , v , q a , q b MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqGqFfpeea0xe9vq=Jb9 vqpeea0xd9q8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr 0=vr0db8meaabaqaciGacaGaaeqabaWaaeaaeaaakeaacqaH7oaBca GGSaGaamODaiaacYcacaWGXbWaaSbaaSqaaiaadggaaeqaaOGaaiil aiaadghadaWgaaWcbaGaamOyaaqabaaaaa@4042@ must be set to 0.0
    • Inlet and Outlets are not yet available
    • The MUSCL scheme to reduce free surface diffusion is not available
  6. The fluid (/ALE/EULER) time step can be controlled using the Engine keyword /DT/ALE.