Particle position each timestep (during simulation)
Hi, i have the following problem:
I need to know how many particles are there in the zone 1 and zone 2 of a room. An example: 10 meter long room (x direction), while the first 5 meters are the zone 1 and the other 5 meters are zone 2. The particle position file outputs the coordinate (x y z) of each particle, so it will be like: if x < 5, sum to zone 1, else, sum to zone 2 The actual output while solving the uncoupledKinematicParcelFoam is Cloud: kinematicCloud Total number of parcels added = 1210 Total mass introduced = 1.01368723e17 Current number of parcels = 1210 Current mass in system = 1.01368723e17 ExecutionTime = 0.61 s ClockTime = 1 s and my objective is to add the following Current number of parcels in Zone 1 = xxx Current number of parcels in Zone 2 = yyy Is it possible to make it in the solver? Or it's better to make a separate code to extract this information? By the way, i don't know c++ programming =( Thank you, and if anyone needs I can send the room from Annex 20 with the uncoupledKinematicParcelFoam working. PS: Using OpenFOAM 1.7.x 
rather than modify the code, you can acturally find the particle position under time/lagrangian/postion. sort them in the dirction of interest in Excel or matlab. Then your answer would be obvious.

Thank you for the answer Edison, this really works for simple cases if there is not many zones.
But the problem is to have more 3D zones where the coordinates are complicated. I did a simple fortran code and its working by the moment. Thank you for the tips 
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