[Paraview] Unstructured rectilinear mesh vs legacy vtk format

[Aniruddha Panda]

Got it, thanks!

---------------------------------

With thanks & regards

*Aniruddha Panda*

PhD Researcher,

TU Eindhoven,

The Netherlands


On Sun, May 20, 2018 at 11:12 PM kenichiro yoshimi <rccm.kyoshimi at gmail.com>
wrote:

> Hi,
>
> I just sent an email with a typo. "Cell Data to Point Data" filter was
> correct.
>
> 2018年5月20日(日) 13:30 kenichiro yoshimi <rccm.kyoshimi at gmail.com>:
>
>> Hi Aniruddha,
>>
>> I think the reason why the data looks discontinuous is that it is
>> defined as cell data. So the easiest way is to use "Point Data to Cell
>> Data" filter to convert from cell data to point data, which is using a
>> very basic straight averaging.
>>
>> Best Regards
>>
>> 2018-05-20 3:30 GMT+09:00 Aniruddha Panda <aniruddhamit at gmail.com>:
>> > I have a cartesian grid on two different codes, one uses the legacy
>> format
>> > to write the data in vtk format where the co-ordinates of equidistant
>> points
>> > in x y and z directions are used and the associated velocity (or any
>> other
>> > state variable) values are written.
>> >
>> >
>> > Whereas in the code which uses the unstructured dataset the each
>> quadrant
>> > extents are written and the associated cell data is written. Later the
>> idea
>> > is to have adaptive mesh refinement on this.
>> >
>> > When I visualise both the files ( lets say for flow through a square
>> duct,
>> > pic attached ) I see a smooth representation that paraview automatically
>> > calculates for the mesh in case of vtk whereas it appears like a
>> > discontinuous data in case of vtu ( i assume vtu does lead to a
>> > discontinuous field) . May I know if there is a smoothing filter which
>> > allows me to interpolate the data onto an equidistant point cloud in all
>> > directions so as to have smooth profile in my postprocessing.
>> >
>> > Figure1. vtk flow through a square duct
>> > Figure2 vtu flow through a square duct
>> > Figure3 the velocity profile across the diagonal of the slice ( from
>> vtk )
>> > Figure4 the velocity profile across the diagonal of the slice ( from
>> vtu)
>> >
>> > ---------------------------------
>> >
>> > With thanks & regards
>> >
>> > Aniruddha
>> >
>> >
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