[Paraview] Inaccurate results with Probe filter

[Berk Geveci]

Hi Tony,

What kind of cells are these? Can you make the data available to us?

-berk


On Tue, Mar 19, 2013 at 12:16 PM, Tony McDaniel <tonymcdaniel at gmail.com>wrote:

> I'm using the Probe Location filter to extract data from a 3D CFD solution
> for an internal flow, and I'm not getting the data that I should be for
> some (but not all) of the points. The dataset is approximately 7 million
> nodes saved in Ensight format.
>
> I'm comparing the data returned by Paraview to the data at the same
> locations in FieldView. For licensing reasons, I would prefer to use
> Paraview for this research, but I also need accurate solutions.
>
> For two representative probe locations, I have the following results:
> x       y       z       pv_density  fv_density  pv_pressure fv_pressure
> 0.3912    -0.0376    -0.0566    0.9040      0.9040        67779.9
> 67779.9
> 0.3912    -0.0426    -0.0516    0.8275      0.8623        65849.0
> 66176.3
>
> The first point matches precisely between Paraview and FieldView. However,
> the second point is substantially different. In addition, the velocity at
> point two is {0,0,0} indicating that the point is on the boundary, though
> it is not actually.
>
> Looking at color plots in Paraview, the color under the point location
> clearly matches the numbers from FieldView. I've uploaded plots showing
> pressure in the plane containing the two locations here:
> https://dl.dropbox.com/u/**744216/probe1.png<https://dl.dropbox.com/u/744216/probe1.png>
> https://dl.dropbox.com/u/**744216/probe2.png<https://dl.dropbox.com/u/744216/probe2.png>
>
> The values are wrong for points that are close to the boundary, and match
> FieldView for points away from the boundary. I have also tried importing
> the locations from a CSV file and using the Resample Dataset and get the
> same values.
>
> Can anyone shed light on why this is happening?
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