12.1.13. Particle-in-cell model (PIC)

This section contains keywords relating to the Particle-in-cell model (PIC).

12.1.13.1. FRIC_EXP_PIC

Data Type: DOUBLE PRECISION

Volume fraction exponential scale factor in frictional stress model.

12.1.13.2. FRIC_NON_SING_FAC

Data Type: DOUBLE PRECISION

Non-singularity term in frictional stress model.

12.1.13.3. MPPIC_COEFF_EN1

Data Type: DOUBLE PRECISION

An empirical dampening factor for the frictional stress model.

12.1.13.4. MPPIC_COEFF_EN_WALL

Data Type: DOUBLE PRECISION

Normal coefficient of restitution for parcel-wall collisions.

12.1.13.5. MPPIC_COEFF_ET_WALL

Data Type: DOUBLE PRECISION

Tangential coefficient of restitution for parcel-wall collisions.

12.1.13.6. MPPIC_VELFAC_COEFF

Data Type: DOUBLE PRECISION

Solids slip velocity scale factor. This term can be used to scale the bulk solids velocity when calculating parcel/bulk solids slip velocity. Scaling is uniform in all three directions.

12.1.13.7. PIC_CD_E

Data Type: DOUBLE PRECISION

Restitution coefficient used with collision damping

12.1.13.8. PIC_CFL

Data Type: DOUBLE PRECISION

Solids CFL (Courant-Friedrichs-Lewy) value. This term can be used to arrest solids time step through a local examination of parcel velocity. Leave undefined (blank) to disable time step control.

12.1.13.9. PIC_CFL_CONTROL

Data Type: CHARACTER

Control variable for managing solids CFL value. Solids time step will be based on MAX or AVG calculated solids CFL.

12.1.13.10. PIC_CFL_PARCEL_FRACTION

Data Type: DOUBLE PRECISION

Parcel fraction threshold to invoke a change in solids time step based on solids CFL value.

12.1.13.11. PIC_COLLISION_DAMPING

Data Type: LOGICAL

Flag to turn on/off PIC collision damping model.

12.1.13.12. PSFAC_FRIC_PIC

Data Type: DOUBLE PRECISION

Pressure linear scale factor in frictional stress model.