[OpenFOAM] Bug in Paraview reader? Color wrongly interpolated?

1/153 · August 3, 2012, 11:37

Hi guys,

What if you open the channel flow case and set an initial velocity in the internal field as a constant U_internal=UC, and using parafoam to see the velocity contour, I found the inlet and outlet cells are not colored as UC, but it seems to be (0+UC)/2.

I am using paraview 3.14.1, 64 bits, Ubuntu, of 2.1

Anyone can confirm my finding?

wyldckat · August 3, 2012, 14:34

Hi 1/153 * dw

What's the representation form you're using? Namely, when you choose the field to be represented, is it the cell center mode or the point/vertex mode?

If it's the point mode, it's natural that you're picking up the "no-slip wall" boundary condition, where U is 0.

Best regards,
Bruno

1/153 · August 3, 2012, 17:12

velocity.jpg

See the inlet cells.

I am using point mode as I did before. No problem before, it must be something different in this version I guess.

And using paraFoam -builtin, I have no problem.

wyldckat · August 4, 2012, 06:37

Does the same happen with a tutorial case such as "incompressible/simpleFoam/pitzDaily"?

August 3, 2012, 11:37	Bug in Paraview reader? Color wrongly interpolated?	#1
1/153 Member dw Join Date: Jul 2012 Posts: 32 Rep Power: 14	Hi guys, What if you open the channel flow case and set an initial velocity in the internal field as a constant U_internal=UC, and using parafoam to see the velocity contour, I found the inlet and outlet cells are not colored as UC, but it seems to be (0+UC)/2. I am using paraview 3.14.1, 64 bits, Ubuntu, of 2.1 Anyone can confirm my finding?

August 3, 2012, 14:34		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,981 Blog Entries: 45 Rep Power: 128	Hi 1/153 * dw What's the representation form you're using? Namely, when you choose the field to be represented, is it the cell center mode or the point/vertex mode? If it's the point mode, it's natural that you're picking up the "no-slip wall" boundary condition, where U is 0. 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 Last edited by wyldckat; August 3, 2012 at 14:35. Reason: "mode", not "more"

August 4, 2012, 06:37		#4
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,981 Blog Entries: 45 Rep Power: 128	Does the same happen with a tutorial case such as "incompressible/simpleFoam/pitzDaily"? __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

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August 3, 2012, 17:12		#3
1/153 Member dw Join Date: Jul 2012 Posts: 32 Rep Power: 14	velocity.jpg See the inlet cells. I am using point mode as I did before. No problem before, it must be something different in this version I guess. And using paraFoam -builtin, I have no problem.