print position of Lagrangian particle?

sven82 · March 8, 2010, 10:52

hi foamers,

I'm work at the moment with icoLangrangianFoam.
icoLagrangianFoam is a simple Solver exactly like icoFoam,
bur with Lagrangian particle. Now, i have problem with the position of the Lagrangian particle. For the post processing I want to follow the particle trace with a simple loop. For this loop I need the position particle, but everyone of my try s fail.
Know everyone how I can print the x,y and z position of Lagrangian particle?

thy for any help,
Sven

andrewryan · March 8, 2010, 12:09

I'm not sure if I understood your question correctly. There is a folder called lagrangian in the folder of every timestep. It contains a folder with the name of the could and a file called positions..

matejfor · March 9, 2010, 03:58

Another possibility would be to use particleTracks from $FOAM/applications/utilities/postProcessing/lagrangian which creates particle tracks for paraview from where you can export the data to a file. There's also other way, to add a bit of coding into your solver to dump the positions or any other info about your particles. search in src directory for dumpParticlePositions or writePostions function (as in basic/Cloud/Cloud.H). The only problem with this solution is, that the IOstream is that it cannot append, so you will have loads of files for each time-step. but easy script will sort it out I guess.

hope this helps

matej

andrewryan · March 9, 2010, 08:09

I didn't know about the particle tracks utility.. thx for the hint

Alaska1964 · June 16, 2016, 09:58

Hi Matej,
I am trying to track the location of the particles but i dont know how.
In my case particles are injected from 4 different regions and I want to see where these particles are located after 1 second of calculations.
In other words I want to learn the location of the particles with respect to their release position.

I would be glad if you could help me.

Kind regards,
Alex

March 8, 2010, 10:52	print position of Lagrangian particle?	#1
sven82 Member Sven Degner Join Date: Mar 2009 Location: Zürich Posts: 55 Rep Power: 17	hi foamers, I'm work at the moment with icoLangrangianFoam. icoLagrangianFoam is a simple Solver exactly like icoFoam, bur with Lagrangian particle. Now, i have problem with the position of the Lagrangian particle. For the post processing I want to follow the particle trace with a simple loop. For this loop I need the position particle, but everyone of my try s fail. Know everyone how I can print the x,y and z position of Lagrangian particle? thy for any help, Sven

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March 8, 2010, 12:09		#2
andrewryan Member Andrew Ryan Join Date: Mar 2009 Posts: 47 Rep Power: 17	I'm not sure if I understood your question correctly. There is a folder called lagrangian in the folder of every timestep. It contains a folder with the name of the could and a file called positions..

March 9, 2010, 03:58		#3
matejfor Senior Member matej forman Join Date: Mar 2009 Location: Brno, Czech Republic Posts: 182 Rep Power: 17	Another possibility would be to use particleTracks from $FOAM/applications/utilities/postProcessing/lagrangian which creates particle tracks for paraview from where you can export the data to a file. There's also other way, to add a bit of coding into your solver to dump the positions or any other info about your particles. search in src directory for dumpParticlePositions or writePostions function (as in basic/Cloud/Cloud.H). The only problem with this solution is, that the IOstream is that it cannot append, so you will have loads of files for each time-step. but easy script will sort it out I guess. hope this helps matej

March 9, 2010, 08:09		#4
andrewryan Member Andrew Ryan Join Date: Mar 2009 Posts: 47 Rep Power: 17	I didn't know about the particle tracks utility.. thx for the hint

June 16, 2016, 09:58		#5
Alaska1964 New Member Alaska1964 Join Date: May 2015 Posts: 16 Rep Power: 11	Hi Matej, I am trying to track the location of the particles but i dont know how. In my case particles are injected from 4 different regions and I want to see where these particles are located after 1 second of calculations. In other words I want to learn the location of the particles with respect to their release position. I would be glad if you could help me. Kind regards, Alex