This file is used to impose nodal values of specific variables at predefined time levels. Although it is intended for unsteady computations, it can also be used in steady computations. The format is as follows:
ntsteps 1 1 time_level nmbr_bc_conds nmbr_bc_conds nodeid var_nbr value [domain] nodeid var_nbr value [domain] nodeid var_nbr value [domain] ...... ....... ..... ...... ...... ....... ..... ...... ...... ....... ..... ...... time_level nmbr_bc_conds nmbr_bc_conds nodeid var_nbr value [domain] nodeid var_nbr value [domain] nodeid var_nbr value [domain] ...... ....... ..... ...... ...... ....... ..... ...... ...... ....... ..... ...... time_level nmbr_bc_conds nmbr_bc_conds nodeid var_nbr value [domain] nodeid var_nbr value [domain] nodeid var_nbr value [domain] ...... ....... ..... ...... ...... ....... ..... ...... ...... ....... ..... ......
where:
| Number of time levels (32-bit integer) |
| Current time level (64-bit double-precision) |
| Number of boundary conditions to impose at each time level (32-bit integer) |
| Node number (32-bit integer) |
| Number of the variable to impose, see Table 14.4: List of Variable Numbers in timebc.dat (32-bit integer) |
| Value of the variable to impose (64-bit double-precision) |
| Number of the grid domain, grid stitching mode only (32-bit integer). It can be omitted if only one domain is present |
Note: The table should be ordered by increasing node number for computational efficiency. When multiple variables are imposed at a node, they should appear sequentially.
The list of assignable variables is shown in the table below
Table 14.4: List of Variable Numbers in timebc.dat
| var_nbr | Variable |
|---|---|
| 1 | pressure (Pa) |
| 2 | x-velocity (air) (m/s) |
| 3 | y-velocity (air) (m/s) |
| 4 | z-velocity (air) (m/s) |
| 5 | temperature (K) |
| 6 | heat flux (W/m2) |
| 7 | LWC (kg/m3) |
| 8 | x-velocity (drop) (m/s) |
| 9 | y-velocity (drop) (m/s) |
| 10 | z-velocity (drop) (m/s) |
| 11 | drop diameter (m)r |
| 12 | nu-tilde (m2/s)/kay (m2/s2) |
| 13 | epsilon (m2/s3)/omega (s-1) |
| 14 | total pressure (Pa) |
| 15 | total temperature (K) |
| 16 | flow angle α (deg) |
| 17 | flow angle β (deg) |
| 18 | ice crystal content (kg/m3) |
| 19 | x-velocity (crystal) (m/s) |
| 20 | y-velocity (crystal) (m/s) |
| 21 | z-velocity (crystal) (m/s) |