Re: [Paraview] Gradient filter: boundary effects

2016-09-27 Thread Moreland, Kenneth
paraview.org'" <paraview@paraview.org> Subject: [EXTERNAL] AW: [Paraview] Gradient filter: boundary effects Hi again, I have examined my mesh (which you can find in the attachment) with Salome and gmsh – there are no flat faces at the boundaries. But there are line elements!

Re: [Paraview] Gradient filter: boundary effects

2016-09-27 Thread Samuel Key
Matthias     Von: Zenker, Dr. Matthias Gesendet: Dienstag, 27. September 2016 17:00 An: 'Moreland, Kenneth' Cc: paraview@paraview.org Betreff: AW: [Paraview] Gradient filter: bounda

Re: [Paraview] Gradient filter: boundary effects

2016-09-27 Thread Zenker, Dr. Matthias
300 from celldatatopointdata. Thanks, Matthias Von: Moreland, Kenneth [mailto:kmo...@sandia.gov] Gesendet: Dienstag, 27. September 2016 15:40 An: Zenker, Dr. Matthias Cc: paraview@paraview.org<mailto:paraview@paraview.org> Betreff: Re: [Paraview] Gradient filter: boundary effects Matthi

Re: [Paraview] Gradient filter: boundary effects

2016-09-27 Thread Moreland, Kenneth
: "Zenker, Dr. Matthias" <matthias.zen...@erbe-med.com> Date: Tuesday, September 27, 2016 at 9:06 AM To: "Moreland, Kenneth" <kmo...@sandia.gov> Cc: "paraview@paraview.org" <paraview@paraview.org> Subject: [EXTERNAL] AW: [Paraview] Gradient filter: bo

Re: [Paraview] Gradient filter: boundary effects

2016-09-27 Thread Zenker, Dr. Matthias
interpret your autoreply correctly)! Matthias Von: Moreland, Kenneth [mailto:kmo...@sandia.gov] Gesendet: Dienstag, 27. September 2016 14:36 An: Zenker, Dr. Matthias; paraview@paraview.org Betreff: Re: [Paraview] Gradient filter: boundary effects You could run the results through the point to cell

Re: [Paraview] Gradient filter: boundary effects

2016-09-27 Thread Moreland, Kenneth
27, 2016 at 8:28 AM To: "Moreland, Kenneth" <kmo...@sandia.gov>, "paraview@paraview.org" <paraview@paraview.org> Subject: [EXTERNAL] AW: [Paraview] Gradient filter: boundary effects Hi Kenneth, thank you for the quick answer! So it seems not that trivia

Re: [Paraview] Gradient filter: boundary effects

2016-09-27 Thread Zenker, Dr. Matthias
: [Paraview] Gradient filter: boundary effects Matthias, The gradient is estimated with finite differences. Thus, it is not wholly unexpected that there could be differences at the boundaries. However, the algorithm does not assume zero for adjacent cells at the boundaries. The way the unstructured

Re: [Paraview] Gradient filter: boundary effects

2016-09-27 Thread Moreland, Kenneth
: ParaView <paraview-boun...@paraview.org> on behalf of "Zenker, Dr. Matthias" <matthias.zen...@erbe-med.com> Date: Tuesday, September 27, 2016 at 5:45 AM To: "paraview@paraview.org" <paraview@paraview.org> Subject: [EXTERNAL] [Paraview] Gradient filter: boundary

[Paraview] Gradient filter: boundary effects

2016-09-27 Thread Zenker, Dr. Matthias
Hi, when I use the gradient filter (unstructured dataset), I observe edge effects which are IMO unphysical. For the nodes on the outer boundary of my domain, the gradient magnitude is smaller than I would expect. The behavior is like the filter tries to use the adjacent nodes to calculate the