How to Plot Average Temperature or Other Variables of a Domain Versus Pipe n CFD-Post

Shomaz ul Haq · March 15, 2016, 04:56

Dear all,

Hi. Hope are well. I wanted to ask how can I make variable of temperature that gives me an average of temperature in all cross sections of a domain so that I can plot that temperature versus the axis of a pipe? I know that an expression can be used in making a scalar varaiable. I made an expression "areaAve(Temperature)@Plane X" but that only gave me average temperature at one plane. I want to know how can I plot for example inner pipe and outer pipe/annnulus average cross sectional temperatures versus axis of pipe. Basically I have found out temperature along a line versus axis of pipe. I did that by making a line but I want to know how can I extend that concept to all cross sections in a domain? Would be extremely grateful. Thanks.

ghorrocks · March 15, 2016, 08:21

The only way I can think of to do this is to generate lots of cross sections. You can make this easier by scripting it using a session file in CFD-Post.

Shomaz ul Haq · March 15, 2016, 08:42

Thanks a lot Glenn. What is a "session file" and "script"? and how can I script using a session file in CFD Post? Would be grateful. Thank you.

ghorrocks · March 16, 2016, 02:52

Have a look at the documentation for CFD-Post. It describes session files.

Shomaz ul Haq · March 20, 2016, 06:38

Hi. Hope all are well. Thanks a lot Glenn. I looked at the CFD-Post Session Menu in ANSYS Help. It tells how to create a new session command, start recording and stop recording, and play session command. I am confused how to generate graphs of average values of variables in a domain at different cross sections as I want to plot average variables values along the length of pipe. I don't know anything about scripting. Can somebody help? I need it urgently. Is there a tutorial online where I can learn this? Would be extremely grateful if you could help me out. Thank you.

Shomaz ul Haq · March 20, 2016, 08:30

Hi all. I have understood what is a script file, process of scripting, saving and recording it. Now I want to ask what is meant by "scripting a session file" as by definition scripting is the editing and running of "journal files" and how can I do that to create average values of variables in a domain at different cross sections along the length of a pipe? Would be extremely grateful if someone could help. Thank you.

ghorrocks · March 20, 2016, 19:55

Have a look at the power syntax (using perl). Then you can put loops, conditional statements, maths and other features in your session files.

In your case you could create a loop which generates lots of cross sections, then gets the averaged condition at each cross section and outputs it to a file.

ordinary · June 6, 2018, 13:22

Hello there,
Is there any alternative solution methods for this kind of problems?

ghorrocks · June 6, 2018, 19:43

Yes, you can define the sections in the mesh and do it in the solver and output the results to monitor points.

March 15, 2016, 04:56	How to Plot Avg Temperature (Other Variables) of Domain Vs Axis Length In CFD-Post	#1
Shomaz ul Haq Senior Member Shomaz ul Haq Join Date: Aug 2015 Location: Islamabad, Pakistan Posts: 205 Rep Power: 12	Dear all, Hi. Hope are well. I wanted to ask how can I make variable of temperature that gives me an average of temperature in all cross sections of a domain so that I can plot that temperature versus the axis of a pipe? I know that an expression can be used in making a scalar varaiable. I made an expression "areaAve(Temperature)@Plane X" but that only gave me average temperature at one plane. I want to know how can I plot for example inner pipe and outer pipe/annnulus average cross sectional temperatures versus axis of pipe. Basically I have found out temperature along a line versus axis of pipe. I did that by making a line but I want to know how can I extend that concept to all cross sections in a domain? Would be extremely grateful. Thanks. ordinary likes this. Last edited by Shomaz ul Haq; March 15, 2016 at 06:30.

March 15, 2016, 08:21		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	The only way I can think of to do this is to generate lots of cross sections. You can make this easier by scripting it using a session file in CFD-Post. sandeep02061990 likes this.

June 6, 2018, 19:43		#9
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Yes, you can define the sections in the mesh and do it in the solver and output the results to monitor points. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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March 15, 2016, 08:42		#3
Shomaz ul Haq Senior Member Shomaz ul Haq Join Date: Aug 2015 Location: Islamabad, Pakistan Posts: 205 Rep Power: 12	Thanks a lot Glenn. What is a "session file" and "script"? and how can I script using a session file in CFD Post? Would be grateful. Thank you.

March 16, 2016, 02:52		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Have a look at the documentation for CFD-Post. It describes session files.

March 20, 2016, 06:38		#5
Shomaz ul Haq Senior Member Shomaz ul Haq Join Date: Aug 2015 Location: Islamabad, Pakistan Posts: 205 Rep Power: 12	Hi. Hope all are well. Thanks a lot Glenn. I looked at the CFD-Post Session Menu in ANSYS Help. It tells how to create a new session command, start recording and stop recording, and play session command. I am confused how to generate graphs of average values of variables in a domain at different cross sections as I want to plot average variables values along the length of pipe. I don't know anything about scripting. Can somebody help? I need it urgently. Is there a tutorial online where I can learn this? Would be extremely grateful if you could help me out. Thank you.

March 20, 2016, 08:30		#6
Shomaz ul Haq Senior Member Shomaz ul Haq Join Date: Aug 2015 Location: Islamabad, Pakistan Posts: 205 Rep Power: 12	Hi all. I have understood what is a script file, process of scripting, saving and recording it. Now I want to ask what is meant by "scripting a session file" as by definition scripting is the editing and running of "journal files" and how can I do that to create average values of variables in a domain at different cross sections along the length of a pipe? Would be extremely grateful if someone could help. Thank you.

March 20, 2016, 19:55		#7
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	Have a look at the power syntax (using perl). Then you can put loops, conditional statements, maths and other features in your session files. In your case you could create a loop which generates lots of cross sections, then gets the averaged condition at each cross section and outputs it to a file.

June 6, 2018, 13:22		#8
ordinary Member Emre Join Date: Nov 2015 Location: Izmir, Turkey Posts: 97 Rep Power: 11	Hello there, Is there any alternative solution methods for this kind of problems?