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fire modelling

Posted 2010年12月7日 GMT-5 09:22 Heat Transfer & Phase Change Version 4.1 2 Replies

R. Bokdam
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Hi all,

I'm trying to model a fire in Comsol, to ultimately determine the heating of a steel ventilation duct which penetrates through a concrete wall. Up till now I have only tried to model the room and the fire.
I defined the fire as a temperature boundary at the bottom of the room with temperature: 20+345*log10(8*t[min]+1).
Does anybody have another (better) idea to model a fire in Comsol?

thanks.
2 Replies Last Post 2015年12月26日 GMT-5 04:31
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2010年12月7日 GMT-5 10:49
Hi

I havent tried, but from the physical principles, I suppose you should mix conductive and radiative source exchange. Although the radiative issue is often tricky (and highly non-linear)

--
Good luck
Ivar
Hi I havent tried, but from the physical principles, I suppose you should mix conductive and radiative source exchange. Although the radiative issue is often tricky (and highly non-linear) -- Good luck Ivar
Valente Martins
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Posted: 9 years ago 2015年12月26日 GMT-5 04:31
Hello,

Did you got your fire model working?

It works with convection only or convection and radiation? If applies radiation how you applied that mechanism?

Thank you so much in advance.

Happy new year

Valente Martins
Hello, Did you got your fire model working? It works with convection only or convection and radiation? If applies radiation how you applied that mechanism? Thank you so much in advance. Happy new year Valente Martins

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