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Modeling smoke ventilation

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Old   October 13, 2023, 00:53
Default Modeling smoke ventilation
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arun
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Hi,

I need to model smoke ventilation in car parking area. How to add smoke and to see volume of each component of smoke(like co2,co, h2o etc) in CFX. Also how to see visibility in smoke? Need to create visibility contour. Please let me know any leads.
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Old   October 19, 2023, 01:01
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It Would be great, if someone helped on this topic. I am a new starter and it would be beneficial for me as I am doing a project regarding Smoke Ventilation.
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Old   October 20, 2023, 07:21
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Questions:
- What exact question do you want to answer wen doing CFD?
- What approach will you use? Do you want to do this transient, like a developing fire, or steady state? In the latter case you calculate the distribution of smoke (snap shot/photo) of a developed and stable fire. Don't know if this exists.
- How do you define smoke? Can you get away with a simple scalar to model smoke?
- do you also need to include the heat or just smoke.....?
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Old   October 27, 2023, 03:09
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Hi, Iam modelling smoke as a multi species component component by adding mass fraction of each component at source by giving mass flow boundary condition and providing flow rate (Kg/s) of smoke and temperature of smoke.
Simulation is steady state.
I want to see the visibility in smoke now. How we need to add it ?

Attaching a reference video
https://www.youtube.com/watch?v=N85T4S7KB-w
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Old   October 27, 2023, 23:33
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Why are you modelling smoke as a multicomponent mixture? Why not model it as a simple scalar?

By visibility, do you mean an observer is located somewhere and you want some sightlines? Or visibility from ground level upwards? Or visibility between selected points? Or do you want lighting levels from a light source? (which light source?)
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cfd analysis, cfx & air content, smoke cfd analysis, smoke modeling, visibility

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