[pankos]

I need your help.
I have a problem with the "positions" file produced by the lagrange reacting cloud solver for the particle positions. This file contains four barycentric coordinates and topology infos with three numbers in the following format:
(one two three four) one two three, as you know.



I need to input these positions to another homemade visualizer so that I can visualize the particles but I cannot understand what these numbers stand for and how to compute the final global coordinates of the particles? How to get the topology? Is there any location I can get this info?


Thanks

[fresty]

From my MPPIC simulations I know that the 'positions' file generates coordinates of the particle locations [(x y z) cellID] in the global coordinate system. Are you sure you're not talking about the 'coordinates' file? as it generates the barycentric coordinates and topology information. Moreover, visualizing the data in ParaView initially may be useful to establish the process.

[pankos]

There is not any "coordinates" files in "lagrangian" directory. I see only the "positions" file which contains the local barycentric coordinates. How can I create the "coordinates" file? Also, what openfoam version do you use? What I am saying happens in newer versions than v5.0.

[KTG]

I am struggling with Lagrangian particles myself, but saw this function object:


https://www.openfoam.com/documentati...d.html#details


Hopefully it helps-

[pankos]

If i could know what are those last three topology numbers, maybe I could compute the global coordinates. The four first numbers are the barycentric coordinates. If I could get in direct way the global coordinates of the tetrahedral nodes I will be ok.