[vtk-developers] [Paraview] OpenFOAM reader incompatibility with temporal intermpolator

[Berk Geveci]

Hmm. I believe that it uses the timesteps that are in the file and
interpolate in between for RK (2nd order I think) integration. This
should be no different than linearly interpolating between timesteps
accuracy-wise. Do you have an example dataset that I can play with?
The particle tracker's interface is a bit finicky and we have plans to
fix it.

-berk

2011/6/23 Takuya OSHIMA <oshima at eng.niigata-u.ac.jp>:
> Really? Particle tracer never works for me without temporal
> interpolator (I only get a polygonal mesh with 0 cells/points). How do
> you make the interpolation work and how do you specify the timestep
> interval?
>
> Takuya
>
> Takuya OSHIMA, Ph.D.
> Faculty of Engineering, Niigata University
> 8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN
>
> From: Berk Geveci <berk.geveci at kitware.com>
> Subject: Re: [Paraview] OpenFOAM reader incompatibility with temporal intermpolator
> Date: Thu, 23 Jun 2011 09:24:44 -0400
>
>> Hi Takuya,
>>
>> Out of curiosity, why would the lack of temporal interpolator make
>> path lines impractical? The particle tracer does its own interpolation
>> between timesteps.
>>
>> -berk
>>
>> On Thu, Jun 23, 2011 at 5:42 AM, Takuya OSHIMA
>> <oshima at eng.niigata-u.ac.jp> wrote:
>> > Hi,
>> >
>> > I just came across Dave DeMarle's ParaView course slides presented
>> > at the 6th OpenFOAM Workshop.
>> > http://www.openfoamworkshop.org/6th_OpenFOAM_Workshop_2011/Program/Training/deMarle_slides.pdf
>> >
>> > In the 11th slide (Temporal Processing) I see that the "Interpolation
>> > between time steps" is grayed out, which I suspect was done so because
>> > the temporal interpolator did not interpolate the OpenFOAM dataset
>> > (which made path lines unpractical as well).  This is a known
>> > problem that has fixes involving both the OpenFOAM reader and the
>> > temporal interpolator. The fix to the former (which I backported from
>> > my own development version) is attached in this mail and the latter
>> > has already been filed as a bug with a patch:
>> > http://vtk.org/Bug/view.php?id=12151
>> >
>> > Thanks,
>> > Takuya
>> >
>> > Takuya OSHIMA, Ph.D.
>> > Faculty of Engineering, Niigata University
>> > 8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN
>> >
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