Difference between temperature and thermocouple

[French Fuul]

Hi,
As the title says, what is the difference between THERMOCOUPLE and
TEMPERATURE (&DEVC) ? These two parameters give different results
(with default values for TC).
I have to compare experimental and calculated temperatures in a flame
and I don't know which to choose.

Thanks in advance.

[Kevin]

This forum is not a substitute for reading the FDS User's Guide.
Please search on the word THERMOCOUPLE and then ask a question if the
description is not clear.

[French Fuul]

I have read the user's guide. It is writen that THERMOCOUPLE gives the
"true gas temperature", so what does temperature give?
Or maybe I just misunderstand what THERMOCOUPLE does.

[French Fuul]

I think that THERMOCOUPLE is like a small object with its properties,
so it would be like take the temperature of an object.

[Craig Weinschenk]

From the User's Guide: October 29, 2010 FDS Version 5.5 SVNRepository
Revision : 6997

Section 14.3.4
"The output quantity THERMOCOUPLE is the temperature of a modeled
thermocouple. The thermocouple temperature lags the true gas
temperature by an amount determined mainly by its bead size."

Thermocouple temperature is different than the gas temperature based
on the energy balance on the thermocouple bead as given in Equation
14.13

[French Fuul]

I have certainly confused. It is not the gas temperature but the
thermocouple temperature.

Thanks for your help.