Learning Forum

[Lennart]

HellonFirst of all, I'm an absolute beginner in Ansys Fluent. nI'd like to know how I can simulate e.g. a simple laminar pipe flow with various mass-flow rates. Maybe it can be done with UDFs or something like that?nFor example: Simulate a laminar pipe flow with:nmass-flow rate= 1 kg/snmass-flow rate = 2 kg/snmass-flow rate = 3 kg/snetc.nI want the programm to do it automatically and to plot the solution for each mass flow.nn

[Rob]

You want to look up parameters and design points. However, I suggest you start with the tutorials. n

[Lennart]

Hey Rob,nthanks for the quick response. Do you mean, that my problem has something to do with parameters and not with UDFs? Can you recommend a tutorial for my problem?n

[Rob]

Correct, you can use a UDF but the parameters and design points will make it easier. I recommend doing the first few tutorials and then reading the rest to see what's relevant, also look at the videos in the Help. n

[Lennart]

Hey Rob, nthanks, that helped. I’d like to plot a pressure [Pa] vs. x [m] chart with various mass flows so that there’s a pressure profile for each mass flow. How do I get that? Or rather how can I set the x-position as an output parameter ?n

[Rob]

You set an input parameter for massflow and an output parameter for the inlet pressure. The DP table will then give you the data, there is a Response Surface in the Design Exploration tool set, but I don't know if that's in the Student licence. Why you set x-position as an output parameter? n

[Lennart]

I want to plot the pressure vs x profile for various mass flows in one chart so that you can see a pressure profile for each mass flow. I thought that setting the x position as an output parameter would be the only way to plot it like this. n

[Rob]

OK, that's not a parameter, a parameter is a single value, usually an average on a surface or line. You can export an xy plot for each model and read the data into Excel (easiest) or back into Fluent (old school as Fluent is older than Excel). n