FDS+Evac Miscellaneous Examples




Door Flow

These examples are just a collection of simple cases showing how to use the FDS+Evac. All example cases use the standard FDS+Evac human parameters unless otherwise stated. Note, that the figures on this page are just for illustrative purposes only. They are not made with the latest version of the FDS+Evac, but they show the geometry used in the test case calculations. Note that FDS+Evac is a stochastic evacuation modelling programme, where, e.g., the properties of the agents are generated using random distributions, so each FDS+Evac run will produce a (little bit) different result. Doing a quantitative validation would require that many FDS+Evac simulations would be performed and their results analyzed, but for these example cases it is enough to perform just a single FDS+Evac run for each.

Programme version

These example cases have been run using the FDS6 based version of the evacuation programme (FDS 6.5.3, Evac 2.5.2, GIT Revision: FDS6.5.3-937-gee70904). Read the Readme.txt file for the changes in the algorithm and user input. The Readme file is at the Documentation page. Note that the V&V runs are not yet performed for this programme version. And the executables are not on the download page of FDS. These input files are provided for those interested on beta testing the new version. The beta testers should download the latest source code from the FDS-SMV Project page hosted by Google Code and compile it. The stair examples using the STRS input are run with a modified source code (read.f90) due a small bug fix that is not changing any results. It just allows to run the STRS model (the routines used to read in the input file has changed a little bit and the STRS was not read in correctly and produced a program exception, i.e., the program was crashing). The correction will be in the next minor/bug fix release version of FDS.

Input files for the Examples page

Below are the FDS6 based input files for the example cases shown in the Examples page:
Example 1: A simple one floor geometry: fds file 1a, fds file 1b, fds file 1c
Example 2: A simple two floor geometry: fds file 2a, fds file 2b, fds file 2c
Example 3: Atrium: fds file


Stairs A staircase, where agents are entering at the top level (&ENTR) and leaving the stairs at the basement level (&EXIT).
fds file

Stair Example

Stair Example A two floor building with two staircases, one inside the building and the other outside the building. In the first FDS file, the stair landings and flights are modelled using EVSS namelists and in the other two ones the STRS namelists are used to model the entire staircases. The last example shows the problem with the DOOR <==> DOOR connections used to transfer agents from one mesh to some other mesh, like at the bottom of the stairs. These connections do not work (yet) well for bidirectional movement.
fds file
fds file
fds file

Wide Stairs Example

Wide Stairs Example An example of "wide" stairs connecting two floors. This example can be used to learn how the agents are moved from one main evacuation mesh to some other one (like from the ground floor to the first floor):
fds file
fds file, version 2
fds file, version 3
fds file, version 4
The versions 2 and 3 has an intermediate landing. The stairs are going "straight" in version 2, in version 3 there is an 90 degree angle between the bottom flight and the top flight and in version 4 the angle is 180 degrees. Run the cases and see the geometries in Smokeview.

Corridor Flow

Corridor A geometry used to calculate (specific) human flows in corridors.
fds file
result file

Door Flow

Door A geometry used to calculate (specific) human flows through doors.
fds file
result file

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