Smoke Visibility Parameters
These parameters define the substance being burned, the type of fire (smoldering or flaming), and the sign illumination type for Smoke Visibility simulations:
Extinction coefficient
The extinction coefficient characterizes the mode of combustion:
Type of Combustion | Specific Extinction Coefficient (ft2/lbm) |
Smoldering combustion | 21000 |
Flaming combustion | 37000 |
Note: Specify the value of extinction coefficient in units of ft2/lbm.
Sign visibility constant
The sign visibility constant characterizes the visibility of the sign:
Combustion particulate yield for several combustible materials
The combustion particulate yield is the particulate content of the smoke based on the burning fuel. It is an important parameter for characterizing the translucency of the smoke.