FireFOAM Pyrolysis Model

erk070 · April 23, 2013, 17:32

Hello all,

I am trying to evaluate whether or not the fireFOAM solver is appropriate for my needs, which are modeling flame spread over solid fuels. I have looked through the code (from openFOAM 2.1.1) and it seems that the only built-in pyrolysis model is reactingOneDim. However, the equations look three dimensional, with laplacian(kT). How does this model work? I am unsure how it would work with, say, an oddly shaped 3D object using an unstructured mesh. I would set up a case to test this, but I'm not sure how. The examples for multiregion heat transfer seem closer to what my mesh would look like, solid meshes and surrounding flow fields, rather than the fireFOAM example oppositeBurningPanels, where the solid is thin and lies on a domain boundary created by a mesh extrusion.

I know in FDS, conduction through solids is 1D; the temperature at a point depends on which direction you look at it from. I was hoping this wasn't the case with fireFOAM since my solid may not be thin, like in oppositeBurningPanels.

Jumping · September 30, 2013, 11:40

hello erk,

I have also read some of the codes for fireFoam. I think so as what you said: probably in fireFoam (it's 2.1.x for me), the pyrolysis model is for ONE DIMENSION simulation. You may check that both from code and from the tutorial case setup files.

What's more, it seems that fireFoam is not capable for 2D axismmetric simulation?

April 23, 2013, 17:32	FireFOAM Pyrolysis Model	#1
erk070 New Member Join Date: Mar 2013 Posts: 1 Rep Power: 0	Hello all, I am trying to evaluate whether or not the fireFOAM solver is appropriate for my needs, which are modeling flame spread over solid fuels. I have looked through the code (from openFOAM 2.1.1) and it seems that the only built-in pyrolysis model is reactingOneDim. However, the equations look three dimensional, with laplacian(kT). How does this model work? I am unsure how it would work with, say, an oddly shaped 3D object using an unstructured mesh. I would set up a case to test this, but I'm not sure how. The examples for multiregion heat transfer seem closer to what my mesh would look like, solid meshes and surrounding flow fields, rather than the fireFOAM example oppositeBurningPanels, where the solid is thin and lies on a domain boundary created by a mesh extrusion. I know in FDS, conduction through solids is 1D; the temperature at a point depends on which direction you look at it from. I was hoping this wasn't the case with fireFOAM since my solid may not be thin, like in oppositeBurningPanels. Kummi likes this.

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September 30, 2013, 11:40		#2
Jumping New Member PingJ Join Date: Feb 2013 Posts: 2 Rep Power: 0	hello erk, I have also read some of the codes for fireFoam. I think so as what you said: probably in fireFoam (it's 2.1.x for me), the pyrolysis model is for ONE DIMENSION simulation. You may check that both from code and from the tutorial case setup files. What's more, it seems that fireFoam is not capable for 2D axismmetric simulation?