Thunderhead Engineering Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Forum moved to https://forum.thunderheadeng.com

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - tricia

Pages: [1]
1
PyroSim / Re: steady fire
« on: September 05, 2015, 05:03:48 pm »
Hi dave, thanks!

The fire starts instantaneously from the red burner vent but somehow will behave oddly after some time. Couldnt seem to find the reason why, perhaps i will try redrawing the model.

2
PyroSim / Re: steady fire
« on: September 03, 2015, 08:06:52 pm »
Hi Dave,

Thanks for your model. Currently running your model now. Understand that it will be ideal to have even cell size and the simulation will run faster with 4 meshes. Just wondering whether the cell size (0.1929 x 0.1786 x 0.1824) which i am using will affect the result much? is it normal to have pic as shown in the attached file even if no fire spread parameter is specified. Thanks.

3
PyroSim / Re: steady fire
« on: September 01, 2015, 06:56:27 pm »
Hi,

As requested:
https://www.dropbox.com/s/4c4shwnmixf6nd7/Canopy600mm.psm?dl=0

Had deleted some storeys away but the rest of the parameters remain unchanged.
Thank You.

4
PyroSim / Re: steady fire
« on: September 01, 2015, 12:48:25 am »
Thanks for your reply. I notice the 10,000 kW fire will spread to other areas (Pls see attached video and picture). Is it normal to have this result even if I did not specify any spread rate inside the simulation?

5
PyroSim / steady fire
« on: August 31, 2015, 02:32:13 am »
Hi,

I try to create steady fire which is constantly burning without including any fire spread rate and no extinguishing coefficient as well. However, i realise the fire starts to spread to other area then disappear. Unfortunately, the pyrosim file is too big to be uploaded into the website, thus I had attached some screenshots. For reaction, I had used the default values of polyurethane. The fire occurs at the 2nd storey of a 10 storey building. You can see the red fire vent from the images attached. What could be the cause? Is it because the oxygen is used up even though no extinguishing coefficient is stated? Thanks.

6
PyroSim / Re: Smoke Visibility
« on: July 01, 2015, 08:04:29 pm »
Noted. Thanks for your reply =)

7
PyroSim / Re: Smoke Visibility
« on: July 01, 2015, 01:59:55 am »
Hi,
I had attached a image by adjusting the visibility slice file to 5m. Is that what you've meant? =)
This image shows that whatever exceeds the red colour 5m means the visibility is less than the horizontal distance of 5m? I had only modified the max and min scale value. More details to share would be great! Thanks!

8
PyroSim / Smoke Visibility
« on: June 29, 2015, 09:38:58 pm »
Hi, i am running smoke simulation for a building. The acceptance criteria is visibility shall not be less than horizontal distance of 5m at a height of 1.7m from floor level. Is there any way to measure the smoke visibility to check that the criteria is being met? Thanks.

9
PyroSim / Re: sprinkler and hss
« on: April 05, 2015, 08:24:05 pm »
Hi dave, thanks for your reply. I had adjusted the hss, flow rate and flow angle and the hss drops by half though it dont go to zero.

10
PyroSim / sprinkler and hss
« on: April 01, 2015, 12:29:33 am »
Hi, i am new to pyrosim and need some help in this. I had created a simple model with sprinkler and burner. The HSS didnt go to zero when sprinkler is activated. Could anyone advise what could have gone wrong with the attached model? Thanks.

11
PyroSim / Re: How to know whether the fire has been extinguished?
« on: March 21, 2015, 06:46:36 pm »
Thanks for the advice. This is my 1st attempt to try out pyrosim. Will reduce the mesh size and create vent. :)

12
PyroSim / Re: How to know whether the fire has been extinguished?
« on: March 20, 2015, 12:21:41 am »
Hi Dave, Thanks for your help. Attached the file.

For this trial test, I had created a simple models with 3 sprinklers. It appears that the temperature of the sprinklers will still increase after it have been activated which seems weird.

13
PyroSim / How to know whether the fire has been extinguished?
« on: March 19, 2015, 08:26:18 pm »
I had simulated sprinkler right above a 200kW/m2 burner with specified extinguishing coefficient. I am able to check the sprinkler graph that the sprinkler had activated after 74 seconds. The sprinkler is able to lower down the room temperature but it does not cause any changes to the HRR. How do i know whether the fire had been extinguished? Is there any graph which shows that? The simulation video is not able to show that the fire has been extinguished?

Pages: [1]