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Author Topic: Curved tunnel  (Read 651 times)

faker

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Curved tunnel
« on: September 02, 2018, 06:38:49 am »

When I used pyrosim to model curved tunnels, there were inevitably many zigzag obstacles due to grid size limitations, which made the simulation very slow.Do I have any way to simulate this model better?What is the use of "smooth" in obstruction properties?I hope I can get your help. Thank you.
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Erik Carlsson

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Re: Curved tunnel
« Reply #1 on: October 02, 2018, 05:23:53 pm »

Hi faker,

I looked into a similar problem with sloping ceilings during my thesis ~5 years ago. Have a look at the PDF in the below link, specifically section 3, where I attempted to compare the various ways (available at that time) of modelling sloping or curved obstructions, and the impact on smoke. Whilst this specifically addressed sprinkler activation, you should be able to adapt some of the methodologies to your case to determine what will work best for you.

Note that what was previously referred to as FREE_SLIP, was renamed a few years ago and is what you are referring to with "smooth" if I am not mistaken. I recommend that you read the user's guide for more info on this parameter, and I am not convinced that it is appropriate to use in most standard fire engineering cases.

https://www.lunduniversity.lu.se/lup/publication/3563868
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christofer.wickmark

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Re: Curved tunnel
« Reply #2 on: October 09, 2018, 07:27:10 am »

Depending what you are analysing, you may want to consider simplifying your model and assume it has no curves. This simplification can sometimes be made when analysing visibility and similar results. 
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