/BCS/WALL

Block Format Keyword Defines the sliding wall boundary condition with collocated scheme (FVM).

Boundary is enabled on time control or sensor control.
Figure 1.


Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/BCS/WALL/bcs_ID/unit_ID
bcs_wall_title
set_ID sensor_ID
Tstart Tstop

Definition

Field Contents SI Unit Example
bcs_ID Boundary conditions identifier.

(Integer, maximum 10 digits)

unit_ID (Optional) Unit identifier.

(Integer, maximum 10 digits)

bcs_wall_title Wall boundary conditions title.

(Character, maximum 100 characters)

set_ID Set identifier (nodes).

(Integer)

sensor_ID (Optional) Sensor identifier.

(Integer)

Tstart (Optional) Start time to enable boundary conditions.
= 0.0 (Default)

(Real)

[ s ]
Tstop (Optional) Stop time to disable boundary conditions.
= 1e20 (Default)

(Real)

[ s ]

Comments

  1. This boundary condition is compatible with /MAT/LAW151 (MULTIFLUID) (collocated scheme).
  2. Boundary condition is applied on element faces only if all its nodes are in the provided set.
  3. A set of nodes can define faces inside the mesh (internal faces). In this case, the face becomes a new boundary while the option is enabled.
  4. Since the sliding wall boundary condition is defined by default on domain boundaries with collocated scheme (LAW151 (MULTIFLUID)), this option aims to block a flow and release it on a given time (instantaneous opening).
  5. If a sensor is defined, the Tstart and Tstop options are ignored.