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Messages - Timo

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I had the same problem and found the solution in changing the regional settings in Windows before opening the FDS-generated csv file (I'm based in Germany)
Make sure to set the format under regional settings to "English". Windows has also recognized the problem:

PyroSim / Re: Pyrosim soot yield(s)
« on: May 10, 2019, 06:28:59 am »
Under "Edit Reaction" there is a tab "Byproducts" where you can set the soot yield.
Obviously you need to choose a reaction first.

Pathfinder / Tours not saved in results file
« on: December 20, 2018, 09:02:26 am »

using the latest version of Pathfinder it appears the results viewer does not save the tours I created.
After closing and reopening the results file the tours are gone.
There is no "Save" button in the viewer, so shouldn't the tours be auto-saved in the file?


Pathfinder / Re: Avatar color
« on: December 12, 2018, 04:28:08 am »
I used to have the same problem and it seemed to be related to the graphics card.
Since I installed a new graphics card (including upgrade to Win10), the avatars show in colors as they should.

Pathfinder / Re: Do I need to draw my own floors?
« on: November 22, 2018, 09:21:58 am »
Hi Ben,

from my experience room extraction only works with very tidy and accurate dwg imports. Your imported plans don't seem that way. In your case its probably best to draw the rooms by hand using the rectangular room tool or the free hand tool. This is usually quite quick and easy once you get the hang of it. Just use the imported geometry as a background image to draw on.
You may use the copy function for floors that are similar or just slightly different.

The alternative would be to tidy up the .dwg files before importing into Pathfinder. Not sure if it's worth your or the architect's time.

Good luck


you can create a new activation control under the 'Controls' tab. Just select 'Deactivate' at '30 s'.
Then you can link the obstruction (e. g. a wall) with that activation control via 'Obstruction Properties'.


PyroSim / Re: Tenability within Means of Escape
« on: November 12, 2018, 04:54:37 am »
Hi Gary,

from what I gather you are interested in the radiation received at a certain point in space (target) at a certain distance from the heat source (emitter). 'Radiation Loss' is the wrong parameter for this. I suggest you set up a device (or an array of multiple devices) along the egress route, measuring the parameter 'Radiative heat flux gas'. The results will be plotted in a spreadsheet file.

The tenability limit of 2,5 kW/m² is commonly referenced in literature and should be reasonable, especially for short duration of exposure.

In regards to hand calculation your formula doesn't look right. The radiation received by a target is depending (among other things such as temperature and emissivity of the heat source) by the distance and angle from the source, typically described by a configuration factor. You may want to refer to literature on this topic, e. g. D. Drysdale, An Introduction to Fire Dynamics

Good luck


if you double-click on the temperature bar it opens the FDS preferences. There you can change the display settings including data range (use "Custom" in the dropdown menu).


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