Radiation Contours

[Mohamed Fekry]

I've been working on it for a week. FDS doesn't seem to have a direct way of producing a contour of the radiative heat flux coming out of flames.
Does anyone here know of a method in FDS to produce a planar slice that accounts for radiation heat transfer.

I tried adding gas-phase devices at equal intervals from the fire and then charting a graph from the data but that is deemed very inconvenient since I want to know the limits of specific radiations like 1.4 kw/m2 or 6 kw/m2 and the array of devices will only help interpolate a number and not solve the actual radiation equation.  

Many thanks in advance.

[Ed]

If you know the location / plane you are considering, a SLCF or Plot3D might be an option.  You can then use fds2ascii to output the raw numbers if you need them.  These are detailed in Chapter 16 of the user guide.  

[Espen S Gåserud]

Hi,

Still I am not sure how to generate a 2D radiation contour plot (incident radiation) from a FDS simulation. I am aware how to calculate the radiation onto obstacles, but still I have not figured how to generate a 2D contour that shows the spatial variation. The attached plot shows an example of what I am looking for (results from fire simulation using KamelonFire Ex (KFX)). 

I would appreciate if someone could help me out.

best regards

Espen

[dr_jfloyd]

FDS does not have a vector based slice file quantity for radiation (required if you want to show flux along a specific direction, e.g. towards a surface).  FDS does have the slice file quantity for RADIANT INTENSITY, see the User's Guide and Technical Reference Guide for a description.

[Kevin]

INTEGRATED INTENSITY, which is the integral of the radiation intensity, I, over 4*pi solid angles.

[dr_jfloyd]

Thanks for correcting my error Kevin; RADIANT_INTENSITY was back in FDS 4.