[Billy_]

Hi,

I have run a simulation where I am attempting to export the locations of all particles (which the locations will be used for a particle injection file). I have simulated 225 particles falling into a closed hopper, thus requiring these locations for further simulation of the particles exiting the hopper.

I have tried file -> export -> solution data (to a CGNS file) but it doesnt give me the correct number of particle locations (should be 225). I am using matlab to import the file and read the locations of the particles.

Alternatively, I have tried simulating 1 particle in the attempt to export the location of this particle, still doesn't give me the location of one particle.

Am I exporting wrong?
Any suggestions would be appreciated.

UPDATE:
Alternatively, is it possible to run the simulation with the desired number of particles, then create a second simulation linked to the first. The linked simulation will use the particle locations from the first simulation. If this is possible, how do you link projects in Workbench?

[Micael]

You can use particle tracking panel to export particle data to a file, see attached picture. Then you will have to do minor editing to get the injection file format.

[Billy_]

Thanks Micael!

The method you suggested is working correctly.

On a side note, if I have 225 particles within my system and would like to inject all using a file injection, within my injection file, will I need 225 of the following lines of code for each individual particle?

((x y z u v w diameter temperature mass-flow) injection0:ID )

Thanks again.

[Micael]

Yes.
With the method I shown in my previous post you will get the particle position and velocity. You can copy that in Excel for editing to get the format in your last post. If you don't solve for energy equation, just put an arbitrary temperature (like 300K). Also, if you want the particles to be injected with zero velocity, you can simply put that value instead of the ones from the exported file. Adjust mass-flow to get exactly one particle mass for the injection duration (it's commun to use 1e-8 sec for injection duration in FLUENT).

[Billy_]

Thanks Micael, much appreciated.