# 8.3.12. Point Source¶

Point sources (PS) are used in place of mass inlets where either the geometry and/or grid resolution prohibit proper boundary condition specification. For example, a point source may be used to model an injector with dimensions smaller than the grid. Point sources may be defined within a single computational cell, along a plane, or as a volume of computational cells.

Point sources introduce mass directly into a computational cell unlike a boundary condition which specifies flow along a cell face. One consequence of this implementation is that point sources are subjected to convection/diffusion forces and may not travel parallel to the specified directional preference. Directional preference is specified with a velocity vector (i.e., PS_U_g, PS_V_g, etc.), however, directional preference is not required.

Examples showing how to setup point sources can be found in: legacy_tutorials/point_source_spiral

## 8.3.12.1. PS_X_W(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

X coordinate of the west face or edge.

## 8.3.12.2. PS_X_E(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

X coordinate of the east face or edge.

## 8.3.12.3. PS_Y_S(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

Y coordinate of the south face or edge.

## 8.3.12.4. PS_Y_N(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

Y coordinate of the north face or edge.

## 8.3.12.5. PS_Z_B(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

Z coordinate of the bottom face or edge.

## 8.3.12.6. PS_Z_T(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

Z coordinate of the top face or edge.

## 8.3.12.7. PS_I_W(PS)¶

Data Type: INTEGER

• $$1 \le PS \le 5000$$

I index of the west-most cell.

## 8.3.12.8. PS_I_E(PS)¶

Data Type: INTEGER

• $$1 \le PS \le 5000$$

I index of the east-most cell.

## 8.3.12.9. PS_J_S(PS)¶

Data Type: INTEGER

• $$1 \le PS \le 5000$$

J index of the south-most cell.

## 8.3.12.10. PS_J_N(PS)¶

Data Type: INTEGER

• $$1 \le PS \le 5000$$

J index of the north-most cell.

## 8.3.12.11. PS_K_B(PS)¶

Data Type: INTEGER

• $$1 \le PS \le 5000$$

K index of the bottom-most cell.

## 8.3.12.12. PS_K_T(PS)¶

Data Type: INTEGER

• $$1 \le PS \le 5000$$

K index of the top-most cell.

## 8.3.12.13. PS_U_G(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

X-component of incoming gas velocity.

## 8.3.12.14. PS_V_G(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

Y-component of incoming gas velocity.

## 8.3.12.15. PS_W_G(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

Z-component of incoming gas velocity.

## 8.3.12.16. PS_MASSFLOW_G(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

Gas mass flow rate through the point source.

## 8.3.12.17. PS_T_G(PS)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

Temperature of incoming gas.

## 8.3.12.18. PS_X_G(PS, SPECIES)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

• $$1 \le Species \le 100$$

Gas phase incoming species n mass fraction.

## 8.3.12.19. PS_U_S(PS, PHASE)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

• $$1 \le Phase \le 10$$

X-component of incoming solids velocity.

## 8.3.12.20. PS_V_S(PS, PHASE)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

• $$1 \le Phase \le 10$$

Y-component of incoming solids velocity.

## 8.3.12.21. PS_W_S(PS, PHASE)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

• $$1 \le Phase \le 10$$

Z-component of incoming solids velocity.

## 8.3.12.22. PS_MASSFLOW_S(PS, PHASE)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

• $$1 \le Phase \le 10$$

Solids mass flow rate through the point source.

## 8.3.12.23. PS_T_S(PS, PHASE)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

• $$1 \le Phase \le 10$$

Temperature of incoming solids.

## 8.3.12.24. PS_X_S(PS, PHASE, SPECIES)¶

Data Type: DOUBLE PRECISION

• $$1 \le PS \le 5000$$

• $$1 \le Phase \le 10$$

• $$1 \le Species \le 100$$

Solids phase incoming species n mass fraction.