sample line along a curved of a boundary patch

marluc · November 15, 2017, 09:07

Dear All,

suppose I have a pipe and I want to sample values of a variable along the wall. How can I accomplish it at every face centre with the sampling utility of OF (in my case OF 5)? I know it is possible to specify a "cloud" of points and sample at those locations. Is it a better way to do it with OF (instead of using paraview?)?.

Thank you in advance.
Luca

HakikiCanakkaleli · December 28, 2017, 16:32

Hi,

To myself (and alike), two clarifications in your question might be needed:

1. When you state "along the wall", do you mean boundary or internal values of some flow field?

2. When you state "sampling", do you actually mean "probing", as "cloud" indicates probing a simulation 'on-the-fly', yet sampling is usually termed for after-the-termination of a simulation?

marluc · December 28, 2017, 16:52

Hi,
first of all thank you for your answer.

Now, back to your (correct) questions regarding my post:
1. I mean along a boundary wall
2. Sampling as post-processing along the boundary wall for the face values

Best Regards,
Luca

HakikiCanakkaleli · December 28, 2017, 17:32

May I also ask which version of OpenFOAM you are using? There was a paradigm change in sampling and probing fields from OF version 3 towards 4.

marluc · December 28, 2017, 17:45

Hi,
I am using OF 4.x or OF 5.x.
Thank you again for your time.
Best Regards,
Luca

November 15, 2017, 09:07	sample line along a curved of a boundary patch	#1
marluc Member Luca Join Date: Mar 2011 Location: Italy Posts: 62 Rep Power: 15	Dear All, suppose I have a pipe and I want to sample values of a variable along the wall. How can I accomplish it at every face centre with the sampling utility of OF (in my case OF 5)? I know it is possible to specify a "cloud" of points and sample at those locations. Is it a better way to do it with OF (instead of using paraview?)?. Thank you in advance. Luca

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December 28, 2017, 16:32		#2
HakikiCanakkaleli Senior Member Canakkale Dardanelspor Join Date: Aug 2012 Posts: 135 Rep Power: 13	Hi, To myself (and alike), two clarifications in your question might be needed: 1. When you state "along the wall", do you mean boundary or internal values of some flow field? 2. When you state "sampling", do you actually mean "probing", as "cloud" indicates probing a simulation 'on-the-fly', yet sampling is usually termed for after-the-termination of a simulation?

December 28, 2017, 16:52		#3
marluc Member Luca Join Date: Mar 2011 Location: Italy Posts: 62 Rep Power: 15	Hi, first of all thank you for your answer. Now, back to your (correct) questions regarding my post: 1. I mean along a boundary wall 2. Sampling as post-processing along the boundary wall for the face values Best Regards, Luca

December 28, 2017, 17:32		#4
HakikiCanakkaleli Senior Member Canakkale Dardanelspor Join Date: Aug 2012 Posts: 135 Rep Power: 13	May I also ask which version of OpenFOAM you are using? There was a paradigm change in sampling and probing fields from OF version 3 towards 4.

December 28, 2017, 17:45		#5
marluc Member Luca Join Date: Mar 2011 Location: Italy Posts: 62 Rep Power: 15	Hi, I am using OF 4.x or OF 5.x. Thank you again for your time. Best Regards, Luca