[Paraview] particle tracking on top of unsteady flow solution

[Berk Geveci]

Hi Tom-Robin,

ParaView does not support having a time series of particles within a single
csv file. You can have a file series of csv files as described here:

http://www.paraview.org/Wiki/ParaView/Users_Guide/Loading_Data

Unfortunately, you will not be able to specify a time value in this case.
ParaView will pick 0, 1, 2 etc.

To be able to specify time values, you will have to use a  format such as
pvd or Xdmf. Of course, I just noticed that we have absolutely no
documentation on the PVD format :-) We'll fix that. Here is some info:

http://www.cacr.caltech.edu/~slombey/asci/vtk/

Xdmf is better documentation.

Both of these formats support ASCII content. Xdmf supports having all of
the data in one file although if you have thousands of time steps, the file
may get somewhat bulky.

-berk


On Thu, May 8, 2014 at 10:59 AM, Tom-Robin Teschner <
tomrobin.teschner at yahoo.de> wrote:

> Hi,
>
> I am doing particle tracking at the moment and I am visualise my results
> with paraview. I have a 3D Navier Stokes solver from which I get a CGNS
> file with the flow solution (for example velocity and vorticity in x, y and
> z) and I also get csv file where I store position of particles, which i
> track inside my code.
> Now I want to bring them both together, i.e. have an animation of the
> flowfield (let's say of the x velocity) and on top I want to display the
> particles at each timestep (so how they move along the flow). the csv file
> looks something like this (shorten for visualisation):
>
> "X" , "Y" , "Z"
> 0.0068 , 0.52500 , 0.005
> 0.0593 , 0.52510 , 0.005
> 0.1171 , 0.52542 , 0.005
>
> I have loaded the particles into paraview and then used tabletopoints from
> the filters but then I get all the particles displayed, instead of getting
> one particle per timestep. I have tried to use a fourth column for time but
> I was unable to map that to my animation.
>
> Does anyone have an idea how to solve this?
>
> Kind regards,
>  Tom-Robin Teschner
>
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