[OpenFOAM] Particle streamlines with paraview

stephan · February 5, 2006, 19:02

hi all,

does somebody know how to generate streamlines of lagrangian particles?
thanx in advance
stephan

gschaider · February 6, 2006, 12:55

From my experience with paraview (and the data that is written out by Foam) I'd tend to this answer: not without doing some programming

As it is that positional data of the particles is written out for the current timestep.

So there are two routes:
- write a filter for paraview that merges the particle data for some timesteps (good luck)
- rewrite the solver (==write a subclass to the particle class) to write data for one particle to one file (and then you'd still have to write a converter to get that stuff into paraview/VTK in a usable form)

The second approach has the avantage that you could visualize these trajectories with something like gnuplot if you don't need the fields-data.

gschaider · February 6, 2006, 13:06

Forgot. There's an 'easier' way: if your particles are identified by an id and that id is written out (indexedParticle) the trajectory can be reconstructed from the regular data without modifying the solver (you'll have to write a script or a program anyway)

If I'm totally mistaken and there is another (easier) way to plot particle trajectories I'd be interested too.

stephan · February 8, 2006, 06:33

hi bernhard,,

thanx for the answer. since i am not sure how to write the paraview filter, i will go the script-way. maybe it is enough to change the position-files...
stephan

zhoubinwx · July 3, 2009, 03:26

Hi Stephan,

Do you have made some script or you have some method to plot the particle pathline?

I am thinking about this as well.

Bin

flying · July 4, 2009, 09:19

Hey gschaider:

Do you have finished the work? Would you like to give me some hint on it?

Thanks a lot

gschaider · July 6, 2009, 10:14

Quote:

Originally Posted by flying

Hey gschaider:

Do you have finished the work? Would you like to give me some hint on it?

Which work are you referring to?

Bernhard

February 5, 2006, 19:02	Particle streamlines with paraview	#1
stephan Senior Member Stephan Gerber Join Date: Mar 2009 Location: Germany Posts: 118 Rep Power: 17	hi all, does somebody know how to generate streamlines of lagrangian particles? thanx in advance stephan

February 6, 2006, 12:55	From my experience with paravi	#2
gschaider Assistant Moderator Bernhard Gschaider Join Date: Mar 2009 Posts: 4,225 Rep Power: 51	From my experience with paraview (and the data that is written out by Foam) I'd tend to this answer: not without doing some programming As it is that positional data of the particles is written out for the current timestep. So there are two routes: - write a filter for paraview that merges the particle data for some timesteps (good luck) - rewrite the solver (==write a subclass to the particle class) to write data for one particle to one file (and then you'd still have to write a converter to get that stuff into paraview/VTK in a usable form) The second approach has the avantage that you could visualize these trajectories with something like gnuplot if you don't need the fields-data. __________________ Note: I don't use "Friend"-feature on this forum out of principle. Ah. And by the way: I'm not on Facebook either. So don't be offended if I don't accept your invitation/friend request

February 6, 2006, 13:06	Forgot. There's an 'easier' wa	#3
gschaider Assistant Moderator Bernhard Gschaider Join Date: Mar 2009 Posts: 4,225 Rep Power: 51	Forgot. There's an 'easier' way: if your particles are identified by an id and that id is written out (indexedParticle) the trajectory can be reconstructed from the regular data without modifying the solver (you'll have to write a script or a program anyway) If I'm totally mistaken and there is another (easier) way to plot particle trajectories I'd be interested too. __________________ Note: I don't use "Friend"-feature on this forum out of principle. Ah. And by the way: I'm not on Facebook either. So don't be offended if I don't accept your invitation/friend request

February 8, 2006, 06:33	hi bernhard,, thanx for the	#4
stephan Senior Member Stephan Gerber Join Date: Mar 2009 Location: Germany Posts: 118 Rep Power: 17	hi bernhard,, thanx for the answer. since i am not sure how to write the paraview filter, i will go the script-way. maybe it is enough to change the position-files... stephan

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July 3, 2009, 03:26		#5
zhoubinwx Senior Member ZHOU Bin Join Date: Mar 2009 Location: Nanjing/Torino, Nanjing/Piemente, China/Italy Posts: 164 Rep Power: 17	Hi Stephan, Do you have made some script or you have some method to plot the particle pathline? I am thinking about this as well. Bin

July 4, 2009, 09:19		#6
flying Senior Member xinguang cui Join Date: Mar 2009 Posts: 116 Rep Power: 17	Hey gschaider: Do you have finished the work? Would you like to give me some hint on it? Thanks a lot