Learning Forum

[Lukas Walther]

Hi

im simulating a combustion in a cylindrical combustion chamber. I want to plot the heat release rate integrated over the volume along the flow axis. The goal visuals the heat release rate of the fluid domain as a function of the flow axis (distance).

Does anyone have an idea?

Thanks

[Rob]

In Fluent you can plot temperature, and there are other options once you turn on the combustion model(s). Look for the Plots (commonly called xy plots)  in the Results section. 

[Lukas Walther]

Hey Rob i know these options. But for my problem i think i have to create a user defined function. i try to plot a graph that shows the sum of the integrated heat release rate (thermal power) on the whole surface in the cylinder in function of z (flow direction).

Do you understand what i mean?

[Lukas Walther]

technically i need an infinite amount uf surfaces along the cylinder to read the data, but doing that manually would be insane, so i was thinking if there might be some routine for that.

 

[Rob]

Pictures will help.  If you want position & flow data on the casing have a look at profiles and/or Export options. UDFs are more advanced and often used where some creative use of user surfaces is sufficient. 

[Lukas Walther]

this is a contour of the heat release rate on yz plane

[Rob]

And you want the integral (or whatever) at intervals along the casing? You may need to use the TUI to build a journal to create the faces (edges) on the casing. The rest is from the Surface integral tools.