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Author Topic: Soot yield from burnable surfaces part 2  (Read 135 times)

Frederik J

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Soot yield from burnable surfaces part 2
« on: December 02, 2021, 04:44:38 am »

Dear all,
I am using pyrosim software to investigate the impact of fire in a room with wooden lining. I want to model the development of the smoke layer height.  

Setup: My room is 20x30x7 m, burner vent constant at 800 kW. Material is yellow pine, surface of the reaction allow obstruction to burn away, ignition temperature 225?C, HRRPUA=120kW/m2.

My problem: the production of soot from the burnable lining. The lining burns - it ignites and contributes to the total HRR. The total HRR rises to 2000 kW over 250 s, making the wooden surface contribute with 1200 kW compared to the reference case (concrete, without lining). Smoke view visualises a production of soot from the wooden surface. However, height measuring device's results show no significant contribution of soot. How can the soot yield for burnable surfaces be changed?
 
I have tried the "Species Injection" tab in the surface, but it seems to crash if soot yield is added in the respective settings (linked to a material).  Different room sizes have been tested and the trend is same.

Thanks in advance

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