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Topics - wilsonobre

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PyroSim / Heat Detector vs Thermocouple
« on: November 26, 2015, 06:30:38 am »
Hi everyone!
I've got a doubt: What is the difference between a heat detector and thermocouple, why their results appear with the same output value (ºC)!! Theoretically it was expected an output value in Joules from heat detector

PyroSim / Numerical Instability + extinguishment by Inert Agent
« on: August 15, 2015, 04:41:38 pm »
Hi everyone,
I'm just trying to model an extinguishment of fire by Inert Gas, IG-55! This is a 30 minutes of simulation in a Data Center (model_06.psm). When i extract my HRR plot, it's showing me that the fire tends to be extinguished, but when I increment my time of simulation to 50 seconds it gives me an error: Numerical Instability!
I've made a simple test and I got a HRR plot that I want (Ext_IG.psm)

I had attached my 2 models and my HRR plot, so if you can help me i really appreciate this

PyroSim / PyroSim Manual vs FDS UGuide
« on: May 06, 2015, 08:23:18 am »
I everyone!
There is something missing on the FDS User guide. I was searching for extinguishment of fire, on the PyroSim Manual and i found something like this in the page 40 "This parameter governs the suppression of the fire by water. For more information, see section 10.7 of the FDS User’s Guide." but when I went to see, there is no section 10.7 in FDS User's Guide. If my pdf is missing something let me know!

Wilson Nobre

PyroSim / Lumped Species
« on: April 29, 2015, 08:08:58 am »
Hello Everyone!
I'm trying to modelling a inert gas, Argonite to extinguish the fire. I define it as a Lumped Species with composition by volume (Nitrogen- 50% e Argon -50%). I try to inject into my domain, by Nozzles, When I click to run it gave me an error sayin  ERROR: PART line   1.  Particles cannot evaporate to a lumped species.

Is there another way to inject those species into my domain?

PyroSim / Meshes Alignment
« on: April 20, 2015, 06:50:36 am »
Hi Everyone!
I get this message "ERROR: MESH   2 is out of alignment with MESH   1" when I run the simulation! But when I setup my mesh the "Mesh Alignment says that the alignment is fine "passed"!  I'm using this version of PyroSim [2014.2.0807] fds version 6.1.0!
I sent my model in attachments, together with 2 images of those messages


PyroSim / Modeling an inert agent, IG 55 to extinguish the fire
« on: April 13, 2015, 07:01:16 am »
Hello Everybody!
I would like to know how to model an inert gas (IG-55) as extinguishing of the fire in Pyrosim! Does anybody had that experience?


PyroSim / Grid Sensitivity Analysis ?
« on: March 15, 2015, 03:09:39 pm »
What is the"Grid Sensitivity Analysis"? I found some scientific articles that talk about it ... how it works? Can Somebody help me? Thank you

PyroSim / Researches Data Center
« on: December 22, 2014, 06:59:43 am »
Hi everyone! I'm studying a ventilation system in a Data Center and I need some  researches that was made in that field, to apply to my case of study!
Keywords that interest me: Data Center, Detection and Extinguishing System: (IG-55 , FM 200), Aspiration System ...etc

Thank you all

PyroSim / Devices
« on: December 01, 2014, 06:28:52 pm »
Hi guys! Which the device reads temperature and velocity, temperature and pressure? I found in an article, take a look to the image that i have attached

PyroSim / Pressure Relief Damper/Vent
« on: November 17, 2014, 05:57:51 am »
Hi everyone!
I want to simulate a Pressure Relief Vent on Pyrosim! Which surface should i use?  Can you help me

PyroSim / Resources
« on: September 20, 2014, 01:08:01 pm »
Hi Guys!
I will study the topic FDS + EVAC, and I'm here to ask for help in any kind of research, I have the FDS + EVAC technical Referecence and User guides and am looking for more, such as articles among others. Please share with me who has
Here goes my email:

Thanks a lot!

PyroSim / Examples of HRRPA
« on: September 14, 2014, 12:44:51 pm »
Can you help me! I need some examples of the heat release rate per area of some materials, or situations like, in a electrical short circuit case how much is the HRRPA? If you have some documentation about this please send me:

Best Regards

PyroSim / "NKB level"?
« on: July 16, 2014, 04:35:08 pm »
Do you know what is meaning NKB levels in PyroSim? If you have some knowledge about the NKB level, please help us! Thank you
Here is an extract of the text where we find the term: "... It is not a new approach in engineering applications. The concept was first implemented in 1963. The approach was then converted into a five stage framework called NKB level for use in five countries in Northern Europe..."

PyroSim / Hi, guys!
« on: May 22, 2014, 06:02:02 am »
We wanna know if it's possible to have a multiple plot (devc.csv), i.e. , we have two different plots for two differents cases, 1- doors and windows are closed; 2- doors and windows are open. We want to put them together to better explanation. You can see the picture, to understand what we are trying to say.

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