12.1.11. Internal Surface

12.1.11.1. IS_X_W(IS)

Data Type: DOUBLE PRECISION

  • \(1 \le IS \le 500\)

X coordinate of the west face or edge.

12.1.11.2. IS_X_E(IS)

Data Type: DOUBLE PRECISION

  • \(1 \le IS \le 500\)

X coordinate of the east face or edge.

12.1.11.3. IS_Y_S(IS)

Data Type: DOUBLE PRECISION

  • \(1 \le IS \le 500\)

Y coordinate of the south face or edge.

12.1.11.4. IS_Y_N(IS)

Data Type: DOUBLE PRECISION

  • \(1 \le IS \le 500\)

Y coordinate of the north face or edge.

12.1.11.5. IS_Z_B(IS)

Data Type: DOUBLE PRECISION

  • \(1 \le IS \le 500\)

Z coordinate of the bottom face or edge.

12.1.11.6. IS_Z_T(IS)

Data Type: DOUBLE PRECISION

  • \(1 \le IS \le 500\)

Z coordinate of the top face or edge.

12.1.11.7. IS_I_W(IS)

Data Type: INTEGER

  • \(1 \le IS \le 500\)

I index of the west-most cell.

12.1.11.8. IS_I_E(IS)

Data Type: INTEGER

  • \(1 \le IS \le 500\)

I index of the east-most cell

12.1.11.9. IS_J_S(IS)

Data Type: INTEGER

  • \(1 \le IS \le 500\)

J index of the south-most cell

12.1.11.10. IS_J_N(IS)

Data Type: INTEGER

  • \(1 \le IS \le 500\)

J index of the north-most cell

12.1.11.11. IS_K_B(IS)

Data Type: INTEGER

  • \(1 \le IS \le 500\)

K index of the bottom-most cell

12.1.11.12. IS_K_T(IS)

Data Type: INTEGER

  • \(1 \le IS \le 500\)

K index of the top-most cell

12.1.11.13. IS_TYPE(IS)

Data Type: CHARACTER

  • \(1 \le IS \le 500\)

Type of internal surface

Table 12.63 Valid Values

Name

Default?

Description

IMPERMEABLE

No gas or solids flow through the surface.

SEMIPERMEABLE

Gas flows through the surface with an additional resistance. Solids velocity through the surface is set to zero or to a user- specified fixed value (i.e., solids momentum equation for this direction is not solved).

X_IMPERMEABLE

No gas or solids flow in the X direction.

X_SEMIPERMEABLE

Gas flows in the Z direction with additional resistance. Solids velocity in the Z direction is set to zero or to a user- specified fixed value (i.e., solids momentum equation for this direction is not solved).

Y_IMPERMEABLE

No gas or solids flow in the Y direction.

Y_SEMIPERMEABLE

Gas flows in the Y direction with additional resistance. Solids velocity in the Y direction is set to zero or to a user- specified fixed value (i.e., solids momentum equation for this direction is not solved).

Z_IMPERMEABLE

No gas or solids flow in the Z direction.

STL

Arbitrary shaped internal surface defined by an STL file. Only visible to DEM particles or PIC parcels. The fluid phase doesn’t feel this stl internal surface.

12.1.11.14. IS_PC(IS, IDX)

Data Type: DOUBLE PRECISION

  • \(1 \le IS \le 500\)

  • \(1 \le IDX \le 2\)

Parameters defining the internal surface. These values need to be specified for semipermeable surfaces only. The thickness used for pressure drop computation is that of the momentum cell (DX_e, DY_n, or DZ_t). To turn off the resistance, use a large value for permeability.

  • IDX=1: Permeability [1.0E32]

  • IDX=2: Inertial resistance coefficient [0.0]

12.1.11.15. IS_VEL_S(IS, PHASE)

Data Type: DOUBLE PRECISION

  • \(1 \le IS \le 500\)

  • \(1 \le Phase \le 10\)

Value of fixed solids velocity through semipermeable surfaces.