11.1.8. Solids Phase¶
11.1.8.1. SOLIDS_MODEL(PHASE)¶
Data Type: CHARACTER
\(1 \le Phase \le 10\)
Defines the model used for the solids phase.
Name |
Default? |
Description |
|---|---|---|
|
◉ |
Two-fluid model (continuum) |
|
Discrete element model |
|
|
Coarse-grained particle |
|
|
Superquadric particle |
|
|
Multiphase particle-in-cell |
11.1.8.3. D_P0(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): TFM, DEM
Initial particle diameters [m in SI].
11.1.8.4. RO_S0(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): TFM, DEM
Specified constant solids density [kg/m^3 in SI]. Reacting flows may use variable solids density by leaving this parameter undefined and specifying X_S0 and RO_XS0 as well as the index of the inert species.
11.1.8.5. X_S0(PHASE, SPECIES)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
\(1 \le Species \le DIM{\_}N{\_}s\)
Applies to Solids Model(s): TFM, DEM
Baseline species mass fraction. Specifically, the mass fraction of an unreacted sample (e.g., proximate analysis).
11.1.8.6. RO_XS0(PHASE, SPECIES)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
\(1 \le Species \le DIM{\_}N{\_}s\)
Applies to Solids Model(s): TFM, DEM
Specified constant solids species density [kg/m^3 in SI].
11.1.8.7. INERT_SPECIES(PHASE)¶
Data Type: INTEGER
\(1 \le Phase \le 10\)
Applies to Solids Model(s): TFM, DEM
Index of inert solids phase species. This species should not be a product or reactant of any chemical reaction.
11.1.8.8. DIL_INERT_X_VSD(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): TFM, DEM
Mass fraction of inert solids phase species in the dilute region. In dilute region (see DIL_FACTOR_VSD), the solids density is computed based on this inert species mass fraction, rather than the current inert species mass fraction. This may help convergence when the Variable Solids Density model is invoked.
11.1.8.9. DIL_FACTOR_VSD¶
Data Type: DOUBLE PRECISION
Applies to Solids Model(s): TFM, DEM
Factor to define the dilute region where the solids density is set using DIL_INERT_X_VSD. Cells where the solids volume fraction is between DIL_EP_S and DIL_EP_S x DIL_FACTOR_VSD will automatically set the solids density using DIL_INERT_X_VSD instead of the current inerts species mass fraction. Set this factor to zero to always use the current inert species mass fraction.
11.1.8.10. K_S0(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): TFM, DEM
Specified solids or material conductivity [J/(s.m.K) in SI].
11.1.8.11. KS_MODEL(PHASE)¶
Data Type: CHARACTER
\(1 \le Phase \le 10\)
Applies to Solids Model(s): TFM, DEM
Solids (TFM) or particle (DEM) thermal conductivity model for each phase.
Name |
Default? |
Description |
|---|---|---|
|
(TFM or DEM). K_s0 is set to 0 (no conduction). In DEM, calculations are skipped. |
|
|
(TFM only). K_s0 specifies a constant effective solids phase conductivity. |
|
|
(TFM only). K_s0 is set based on user defined function. |
|
|
(TFM only). K_s0 specifies the material conductivity. See Bauer, R. and Schlünder, E.U. (1978). Int. Chem. Eng. 18(2), 181. |
|
|
(DEM only). K_s0 specifies the material conductivity. See Musser, J. (2011), PhD Dissertation, WVU. Chapter 3 (3.6). |
11.1.8.12. C_PS0(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): TFM, DEM
Specified constant solids specific heat [J/(kg.K) in SI].
11.1.8.13. MW_S(PHASE, SPECIES)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
\(1 \le Species \le DIM{\_}N{\_}s\)
Applies to Solids Model(s): TFM, DEM
Molecular weight of solids phase species [kg/kmol in SI].
11.1.8.14. NMAX_S(PHASE)¶
Data Type: INTEGER
\(1 \le Phase \le 10\)
Applies to Solids Model(s): TFM, DEM
Number of species comprising the solids phase.
11.1.8.15. SPECIES_S(PHASE, SPECIES)¶
Data Type: CHARACTER
\(1 \le Phase \le 10\)
\(1 \le Species \le DIM{\_}N{\_}s\)
Applies to Solids Model(s): TFM, DEM
Name of solids phase M, species N as it appears in the materials database.
11.1.8.16. SPECIES_ALIAS_S(PHASE, SPECIES)¶
Data Type: CHARACTER
\(1 \le Phase \le 10\)
\(1 \le Species \le DIM{\_}N{\_}s\)
Applies to Solids Model(s): TFM, DEM
User defined name for solids phase species. Aliases are used in specifying chemical equations and must be unique.
11.1.8.17. CGP_STAT_WT(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Coarse-grain particle statistical weight. The coarse graining is achieved by specifying either the statistical weight, or the coarse-grain particle size. It is not allowed to specify both the statistical weight and Coarse Grain particle size at the same time.
11.1.8.18. CGP_D_P0(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Coarse-grain particle size. The coarse graining is achieved by specifying either the statistical weight, or the coarse-grain particle size (it is not allowed to specify both the statistical weight and coarse-grain particle size at the same time).
11.1.8.19. SQP_A(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Superquadric particle semiaxis in x-direction.
11.1.8.20. SQP_B(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Superquadric particle semiaxis in y-direction.
11.1.8.21. SQP_C(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Superquadric particle semiaxis in z-direction.
11.1.8.22. SQP_M(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Superquadric particle roundness exponent M.
11.1.8.23. SQP_N(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Superquadric particle roundness exponent N.
11.1.8.24. SQP_Q1(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Superquadric particle quaternion q1.
11.1.8.25. SQP_Q2(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Superquadric particle quaternion q2.
11.1.8.26. SQP_Q3(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Superquadric particle quaternion q3.
11.1.8.27. SQP_Q4(PHASE)¶
Data Type: DOUBLE PRECISION
\(1 \le Phase \le 10\)
Applies to Solids Model(s): DEM
Superquadric particle quaternion q4.
11.1.8.28. SQP_CONTACT_EVOLUTION¶
Data Type: LOGICAL
Applies to Solids Model(s): DEM
Flag to turn on/off superquadric evolution contact method for the entire simulation.
11.1.8.29. SQP_INIT_CONTACT_EVOLUTION¶
Data Type: LOGICAL
Applies to Solids Model(s): DEM
Flag to turn on/off superquadric evolution contact method only at time=0. This can help convergence for particles with sharp corners such as cylinders or cubes.