[sharmann2]

Hey, I want to calculate Tmean over the entrance length in a pipe, in fluent.
I guess UDF is the only way to do it.
Is there some PDF or material, which can help me understand how to make UDF for mean temp

[Bruno Machado]

Originally Posted by sharmann2

Hey, I want to calculate Tmean over the entrance length in a pipe, in fluent.
I guess UDF is the only way to do it.
Is there some PDF or material, which can help me understand how to make UDF for mean temp

You can go to report > surface integral and integrate the temperature at the surface you want.

[macfly]

Example 1 shows how you can integrate a variable: https://www.sharcnet.ca/Software/Flu...udf/node20.htm

The simplest way would be to create a fluid zone in the mesh that corresponds to the entrance length of the pipe, then you just have to loop over this zone.

[gearman]

Originally Posted by macfly

Example 1 shows how you can integrate a variable: https://www.sharcnet.ca/Software/Flu...udf/node20.htm

The simplest way would be to create a fluid zone in the mesh that corresponds to the entrance length of the pipe, then you just have to loop over this zone.

Dear macfly!
Why we can't surface integral and integrate the temperature at the surface we want as Bruno Machado said? why we must use the udf?Thank you very much!

[macfly]

Yes gearman, you can postprocess surface or volume integrals as Bruno explained, but you got to use UDFs if you want to calculate and use integrals during solving.

[gearman]

Originally Posted by macfly

Yes gearman, you can postprocess surface or volume integrals as Bruno explained, but you got to use UDFs if you want to calculate and use integrals during solving.

Thank you very much!