I need to track the velocity field of fluid particles using Fluent. I need to provide their initial position and velocity and track their velocities and positions as they move throught the fluid. Is there any way to do this? I know Fluent can do particle tracking, but it doesn't seem to be able to track massless fluid particles, which is what I need to do. Do I need to use a UDF or is there another way?

Display > Pathlines

Does displaying pathlines allow me to output a file containing particle velocity data? I need a file like this in order to perform calculations using another program.