Dear Doctor,

In the CFD-Post, you can calculate the bulk temperature by using post progressing menu, then select mass average or area average temperature, with consider whole of domain of the case.

If you can't do it, you can use fluent's UDF .

Good luck

use C_T(c, t)

where (c) represents the cell ID (type: cell_t) and (t) represents the cell-thread.

For example - to loop over all cell in the domain and force a temperature of 400:

cell_t c;

Thread *t;

thread_loop_c(t,d)

{

   C_T(c,t) = 400.;

}

get the mass averaged temperature over the section or flow domain using fluent's UDF or

using udf or menu to export the required parameters at cell centers to an excel sheet and estimate there.

Hi,

I agree with Maesh.

Try first to use the mass-weighted average temperature across your reference surface and see whether this will work.

If this would not work, try than with your own custom-field-function or user defined function (UDF).

Good luck.

/Adnan

you can calculate the bulk temparature using post prossesing menu, mass average or area average temperture, consider whole of domain.

good luck

As the temperature is mass dependent quantity not area dependent like pressure, you must calculate local Tb for a cross-sectional  plane (3D) and line(2D) with mass weighted average and wall temperature you must calculate it with area weighted average.

Temperature and also any specific property  is an intrinsic property and not dependent on mass. However, the energy or the enthalpy could be considered for mass averaging and getting average temperature

Dear Doctor,

In the CFD-Post, you can calculate the bulk temperature by using post progressing menu, then select mass average or area average temperature, with consider whole of domain of the case.

If you can't do it, you can use fluent's UDF .

Good luck

try with the CFD post, create the expression of tm =intergral.... at the line of rvolution of the temprature tb

Dear Tajudeen

As for as Tb is concerned, It can be find by taking mass weighted average temperature of fluid domain. However, if you are only interested in findind h, there is no need to find Tb but rather you can calculate it directly in fluent by selecting area weighted average then find the average heat transfer coefficient.

Thanks

You can calculate to default interior temperature for solution domain, which is defines all gris point (node) temperature.

Tb can be calculated using volume average integral of temperature in the corresponding zone.

Dear Tajudeen Popoola

First, create several surfaces as cross sections (along a channel for example).

Then, go to the "Reports" and select "Surface integrals".

Next, select "mass weighted average" from "Report type".

Finally, select "temperature" and created sufaces from "Field variables" and "Surfaces", respectively.

Using this instruction you can "Compute" Tb in created cross sections. It will be shown in console screen. you can also write them in a file by selecting "write" instead of "Compute".

Good Luck