[General] 2D color plot from 3D data

Nick88 · February 18, 2013, 12:10

Hi

I have some data defined over the surface of a pipe, and I want to print them on a 2D color map. In order to visualize all the result in a single 2D plot, I would like to use a polar coordinate system (r,theta,z) instead of the cartesian one, and use theta and z as axes for the plot.

How I can do it?

In the images there is an example, made with Tecplot:

export2.jpg
export.jpg

wyldckat · February 18, 2013, 15:25

Greetings Nicolò,

I haven't confirmed this, but I believe the either the "wrap by scalar" or "wrap by vector" filters should do what you want:

Best regards,
Bruno

Nick88 · February 20, 2013, 08:31

Bruno, thanks for the suggestion.

I have obtained the result in the image, using the "warp by vector" filter:

exp0.jpg

Then I can use "Extract Cells By Region" to remove the deformed cells in the area in which the warp filter cuts the geometry, and a "Clip" to remove the irregular boundaries. The final result is this:

exp.jpg

openfoam_user · May 5, 2017, 08:56

Hi Nicolò,

I try to reproduce what you did.

But when I select the 'warp by vectors' filter, the vectors box is blanked. So I can't select any vectors. Do you know the reason ?

Un saluto,
Stéphane

wyldckat · May 7, 2017, 08:27

Quote:

Originally Posted by openfoam_user

But when I select the 'warp by vectors' filter, the vectors box is blanked. So I can't select any vectors. Do you know the reason ?

Quick question: Does the original data (before trying to apply the filter) have any vector fields?
And if it does have vector fields, are they of type "point data" or "cell data"?

openfoam_user · May 9, 2017, 01:33

Hi,

Sorry for the question.
The vector field (the only one) was selected (grey-light colored).

Have a nice day,
Stéphane.

February 18, 2013, 12:10	2D color plot from 3D data	#1
Nick88 New Member Nicolò Demicheli Join Date: Nov 2012 Location: Italy Posts: 4 Rep Power: 13	Hi I have some data defined over the surface of a pipe, and I want to print them on a 2D color map. In order to visualize all the result in a single 2D plot, I would like to use a polar coordinate system (r,theta,z) instead of the cartesian one, and use theta and z as axes for the plot. How I can do it? In the images there is an example, made with Tecplot: export2.jpg export.jpg

February 18, 2013, 15:25		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,975 Blog Entries: 45 Rep Power: 128	Greetings Nicolò, I haven't confirmed this, but I believe the either the "wrap by scalar" or "wrap by vector" filters should do what you want: http://www.paraview.org/Wiki/ParaVie...Warp_By_Scalar http://www.paraview.org/Wiki/ParaVie...Warp_By_Vector Best regards, Bruno __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

February 20, 2013, 08:31		#3
Nick88 New Member Nicolò Demicheli Join Date: Nov 2012 Location: Italy Posts: 4 Rep Power: 13	Bruno, thanks for the suggestion. I have obtained the result in the image, using the "warp by vector" filter: exp0.jpg Then I can use "Extract Cells By Region" to remove the deformed cells in the area in which the warp filter cuts the geometry, and a "Clip" to remove the irregular boundaries. The final result is this: exp.jpg wyldckat likes this.

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May 5, 2017, 08:56		#4
openfoam_user Senior Member stephane sanchi Join Date: Mar 2009 Posts: 314 Rep Power: 18	Hi Nicolò, I try to reproduce what you did. But when I select the 'warp by vectors' filter, the vectors box is blanked. So I can't select any vectors. Do you know the reason ? Un saluto, Stéphane

May 9, 2017, 01:33		#6
openfoam_user Senior Member stephane sanchi Join Date: Mar 2009 Posts: 314 Rep Power: 18	Hi, Sorry for the question. The vector field (the only one) was selected (grey-light colored). Have a nice day, Stéphane.