Temperature rise of concrete cylinder engulfed in fire

[BradyD]

Hi all,

I have a problem that I am having difficult working through. I am trying to calculate the temperature rise on a large concrete cylinder in the middle of a circular, 400 gallon diesel fire. (i.e., the diesel is spilled in a large circle and the cylinder is smack dab in the middle). Ultimately I am trying to compare the temp rise on the cylinder of a 400 gallon, 3 meter diameter spill to a 400 gallon, 8 meter diameter spill.

I have been using looking in NUREG-1805 (Fire Dynamics Tools) and am trying to relate equation 3-2 (Heat Release Rate [kW]) to a temperature rise on the cask.

Would anybody happen to have any guidance?

Thank you.

 

[IRstuff]

Is this for school?

TTFN
faq731-376

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[racookpe1978]

Solid concrete? That's not normally considered a problem heating up. 8<)

Your "heat" is being created by the circular fire - BUT - it is getting moved upwards and away from the concrete cylinder by the convection and air flow into up and "up" of the outside movement of the "circular" fire "cylinder." So the concrete is actually getting heated mostly by the radiation of the flames around it and above it. It is being "cooled" (so to speak" by the cold ground under the concrete.

What are YOUR emissivities of the flame, the concrete, the ground?
What is YOUR assumed flame temperature?
How long have you calculated the fire will burn, and what are YOUR calculations for that length of time?