About Plot Streamlines Using Particle Data (using Delaunay 2D will result in soft)

My computational data consists of particle data, but I would like to plot the streamlines of the flow field made up of these particles so that I can see if there are vortices in the details. My result file is a bit large, I have not found ways to upload to here. I have tried a lot times by using “Delaunay 2D”,which will result in software crashout on all computers that I have test. I want to know is there other approches that can solve my problems? Is there anyone tell me how to operate in details? I will appreciate very much! I can’t wait to know how to operate :love_you_gesture: :handshake: