!ZERO¶
Absolute zero
First line
Parameters
None
Second and subsequent lines
| Variable | Type | Description |
|---|---|---|
ZERO | R | Absolute zero |
Absolute zero is used by radiation boundary conditions (the !RADIATE / !SRADIATE keywords in the control file) to convert input temperatures to absolute temperatures. Specify the following value according to the unit of the input temperature.
| Input temperature unit | ZERO |
|---|---|
| Celsius (°C) | -273.15 (default value) |
| Kelvin (K) | 0.0 |
| Fahrenheit (°F) | -459.67 |
Other input values, such as radiation coefficients, must also be specified in the same unit system as the input temperature.
Notes
- Optional. If omitted, "absolute zero = -273.15" (input in degrees Celsius) is used.
- When entering temperatures in kelvins,
0.0must be explicitly specified for!ZERO. - If
!ZEROis not defined, a warning message is displayed indicating that the default value is being used. - If
!ZEROis defined multiple times, its contents are updated and a warning message is displayed.
Example