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1

PyroSim / Re: Attach a vent to a wall

« on: September 08, 2011, 05:42:52 am »

No One can help me?

2

PyroSim / Attach a vent to a wall

« on: September 05, 2011, 04:38:22 am »

Hi everyone,

After summer vacation I'm coming with a new question : I have to attach vent to walls, but I've always the same error : "VENT XX must be attached to soli obstruction".

I don't know how to attach correctly vents to walls. Can you help me? 

3

PyroSim / Re: Complicated roof

« on: July 21, 2011, 06:35:10 am »

Thanks a lot for your answer! But what do you mean by "box slab" is it the slab tool? I dont' really understand it.

4

PyroSim / Complicated roof

« on: July 19, 2011, 06:34:20 am »

Hi everyone,

Again a question coming from me! Suppose you are used to  

I have to build up a complexe roof and I don't know how to do it. I tried with the "triangle" tool but I find it very complicated.

How would you do that?

http://img804.imageshack.us/img804/9271/coteternit.png

http://img38.imageshack.us/img38/6806/toiteternit.png

5

PyroSim / Re: Problem with burner

« on: June 06, 2011, 06:20:28 am »

Thanks a lot for your answer. I understand now the problem, but without your help I would never have thought that it was coming from the mesh. Thanks a lot! 

6

PyroSim / Re: Problem with burner

« on: May 23, 2011, 08:31:13 am »

Hi everyone,

The problem is when I want to make the fire on the second floor. On the first floor, everything is alright, but on the second floor it doesn't work.

I have attached the FDS file.

I don't know how to resolve this problem... 

7

PyroSim / Soot yield and heat of combustion

« on: May 18, 2011, 05:06:06 am »

Hi everyone,

Here in Switzerland the government tells us that for all cases calculated by FDS we have to put a soot yield of 0.04 and a heat of combustion of 25 kJ/g.
I find that these entries are very big. Am I right? 

Where can I find the heat of combustion and soot yield for an office fire?

Thanks a lot, your work is amazing!

8

PyroSim / Re: Problem with burner

« on: May 06, 2011, 02:15:50 am »

The burner doesn't generate any heat...

9

PyroSim / Problem with burner

« on: May 05, 2011, 06:37:00 am »

Hi there,
I have a really big problem with Pyrosim.
I created a model from a building with a burner inside it. Until today, the model was perfectly running.
But today, when I just wanted to move the burner to put it in another place, the burner is not more working!
And worse, I created the same model with the same burner, and it is alos not working. I don't really understand what is going on. Suddenly the burner doesn't work any more.
Could you please just help me? I'm totally lost...

10

PyroSim / Re: Modify scale on Pyrosim and soot yield

« on: April 13, 2011, 03:24:46 pm »

Hi everyone,

I've again a question : in my country you have to give the surfaces where a soot density reachs a certain level (when generating slices)
For example my limit concentration of soot in a room is 40 mg/m3. I would like to calculate the surfaces where the concentration is more than that value.
Is it possible to do that? Or do I have to do it by hand?

11

PyroSim / Re: Modify scale on Pyrosim and soot yield

« on: March 23, 2011, 05:17:23 am »

Hi Charlie,
Thanks a lot for your help. You're giving me wonderful advices!
I will try for the scale and check for the smoke.

12

PyroSim / Modify scale on Pyrosim and soot yield

« on: March 21, 2011, 04:33:38 am »

Hi everyone,
I'm coming again with questions!

I have two problems with my calculations :

- The first is with the scale on the smokeview view. For example, the scale shows me the maximum soot contentration that I have in my room : 100 mg/m3. My client wants me to change the scale to prove that there is nothing at 120 mg/m3. How can I do that?

- The second thing is the soot yield. I've defined a burner without reaction, and the client wants to know the soot yield. Where can I find it (and change it?).

Thanks a lot,
Laure from Switzerland

13

PyroSim / Re: Problem with open vent

« on: February 15, 2011, 08:58:56 am »

Hello Charlie,
Thanks for your answer!

I think I resolved the problem. Indeed, I didn''t well understand the principle of open mesh boundaries options. I read it in the FDS user guide but I didn''t understand the concept. Could someone please help me? 

14

PyroSim / Problem with open vent

« on: February 15, 2011, 08:12:35 am »

Hi everyone,
I''ve a problem in setting an open vent at the top of a room (to allow the smoke to go out).
When I set the vent (Open surface), the smoke is not going out.
I suppose I''ve a problem with the mesh boundaries but I don''t really understand what to do.
I''ve just set a normal mesh.

What do I have to do? Thanks a lot!!

15

PyroSim / Exhaust proble,

« on: December 06, 2010, 04:38:09 am »

Hello,
I''''m new on the forum. I''''m from Switzerland and working on fire modelling for my job.

I''ve a problem. I''ve made a simulation with an exhaust surface at the top of the room.
I think there''s a problem because where I run the simulation I can''t see the smoke going through the exhaust surface.

Ho do you build exhaust surfaces?

Thanks a lot,
Laure
Laure.