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Newbie July 29, 2003 04:58

heat transfer

Can Fluent calculate and display (in post-processing) heat transfer through a thick wall i.e. 100mm. For example the heat transferred from a flame through the furnace wall and insulation to the room side of the furnace? So that I can compare the computed and actual outside wall temperatures of a furnace.

Thanx, Newbie

Erwin July 29, 2003 05:59

Re: heat transfer
If you want to plot the temperature gradient through the wall you need to include it in your grid as a solid zone.

Otherwise, you can specify the thickness and the outside wall temperature in the wall b.c. panel and calculate the resulting inside wall temperature.

Mcgregor July 29, 2003 06:03

Re: heat transfer
Hi Newbie,

You can use the solve/monitors/surface and solve/monitors/volume commands to plot the kinds of data you are after.

They are fairly easy to use too, as you select the number of monitors you need and then define them individually. Have a look at them in fluent and let me know if you have any specific problems with the monitors (the can also be written to a file, to do this see the first monitors panel and check write as well as plot and print).

Note: you have to set up the monitors before you run the solver

Good luck!


Newbie July 29, 2003 09:06

Re: heat transfer
Thanks Erwin and Mcgregor for the advice.

Erwin your second point - "specify.... and calculate the resulting inside wall temp". Won't the flame temperature determine the inside wall temperature?


Newbie July 29, 2003 09:27

Re: heat transfer
Also, should the region between the solid and the fluid be a wall or an interface to allow the heat transfer calculation. For example, an annulus - should the dividing pipe wall be defined (in boundary types in gambit) as a wall or an interface???



Erwin July 30, 2003 08:05

Re: heat transfer
Point 1: Yes. The Inside wall temperature is a function of heat transfer TO the wall (from the flame), the exterior temperature and the solid thermal conductivity. Point 2: Should be Wall. Interfaces have nothing to do with this problem.

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