Entities React to Temperature, Visibility and Toxicity

LEGION Entities can react to fire data and output from FDS software. This enables you to filter by Environment Map data and also to set up conditions related to FDS output such as temperature, visibility and toxicity. This means that Entities can change their activities (for example, their speed or choice of Exit) according to fire-related factors.

For this to work, you need to create Environment Maps using Slice Files or Plot 3D files. Metrics such as temperature from these maps will then be available for use as filters and with Conditions and Analyses.

You can then introduce spatial objects, for example Direction Modifiers and Drift Zones, that will simulate an evacuating Entity’s reaction to different conditions, such as:

Changing route due to high temperatures
A decrease in speed due to reduced visibility
An exit, staircase or lift being out of use due to smoke or toxic fumes

Let’s assume you want to create a Drift Zone that causes Entities to slow down when visibility drops below a certain point. To do so you need to first set up an Environment Map with a visibility slice file and proceed as follows.

To set up a Drift Zone with an FDS-based filter:

Draw and name your Drift Zone.
Select Modify speed by, enter 25% in the adjacent box and select Speed decreases.
Uncheck the box labelled 'Change direction'.
Click on the ‘Entity Filter’ tab.
Click Advanced.
Enter [ Visibility Map < 10 ] in the main panel.
Click OK.

Entities within the Drift Zone will reduce their speed by 25% if visibility at their location is less than 10 metres.

Note: Direction Modifiers can affect Entities when a Condition is met within a particular area, such as smoke blocking a route. To set up such a condition, define an Analysis in LEGION Model Builder that measures the required metric in the area. The condition in the Direction Modifier should be defined as ‘true’ when the Analysis result meets a desired threshold. For example, visibility < than 10 m.