Fire event attributes
1. On the Lists menu, click > Measurements > Fire Events.
The Fire Events list opens.
|
Note: In lists, you can use the |
The list contains, amongst others, the following attributes:
| Short name | Long name | Description |
|---|---|---|
|
No. |
Number |
Unique number |
|
Name |
Name |
Name of the fire event |
|
FDSFileName |
FDS filename |
Name of the *.fds file that the fire event data is stored in. In the list box, click the file name to show the path to the directory. |
|
Level |
Level |
Name of the level at which the fire event is inserted |
|
x |
X coordinate of the position of the fire event | |
|
y |
Y coordinate of the position of the fire event | |
|
ZOffset |
z-offset |
Height above the level of the position of the fire event [m] |
|
YawAngle |
Yaw angle (around z-axis) |
Angle of rotation of the fire event around the z-axis |
|
TimeOffset |
Time offset |
Time offset of the FDS simulation to the simulation time of Vissim / PTV Viswalk |
Other columns contain specific FDS data. The names of the columns correspond to FDS conventions. The short name and the long name are identical. When you open the *.inpx network file, the relevant data is read from the *.fds file specified in the FDS Filename attribute.
| Name | Description |
|---|---|
|
FDS_CHID |
Prefix for the file name of the result file |
|
FDS_DT |
Time interval, sets FDS by default to: Size of a grid cell / flow velocity |
|
FDS_DT_PL3D |
Time interval during which FDS data were saved in the *.fds file, default value in FDS: 1000000 s |
|
FDS_MAXIMUM_VISIBILITY |
Maximum visibility, default value in FDS: 30 m |
|
FDS_T_BEGIN |
Start time of simulation from FDS, optional, default value in FDS: 0 |
|
FDS_T_END |
Duration of FDS simulation, default value in FDS: 1 s |
|
FDS_VISIBILITY_FACTOR |
Constant C is used as a factor for the calculation of visibility. Default value in FDS: 30 (no unit). As the value decreases, the perception as a reflective object increases, with a higher value as an object that emits light. |
Showing and editing dependent objects as relation
The attribute and attribute values of this network object type are shown in the list on the left, which consists of two coupled lists.
1. In the list on the left, click the desired entry.
The list on the right contains attributes and attribute values of network objects, and/or base data allocated to the network object selected in the list on the left (Using coupled lists):
- FDS Mesh (Attributes of FDS meshes)
- Plot3D Quantities: Result data of quantities from the FDS simulation covering the entire FDS mesh. For further information on FDS output quantities, please refer to the FDS User Manual. The number of quantities shown in Vissim/PTV Viswalk depends on the *.fds file, for example:
- TEMPERATURE: Temperature [°C]
- V-VELOCITY, U-VELOCITY, W-VELOCITY: The velocity of the three gas components u, v, w in [m/s]
- HRRPUV (Heat Release Rate Per Unit Volume): Heat expansion in [kW/m³]
- AEROSOL VOLUME FRACTION: Soot [mol/mol]
-
VOLUME FRACTION (OXYGEN): If not specified by the Plot3D quantity, a constant volume fraction of oxygen of 20.9% is assumed.
- VISIBILITY: Visibility [m]
In the graphic parameters of the fire event, you can select a quantity and display it in the network editor (Graphic parameters for visualizing fire events).
