DrAmine, thanks for your reply!

I still confused about the "PATH ABORT". If the aborted particles are not tracked further, why the aborted particles can be seen in the "Results/Graphics/Particle tracks" and the console. Is that meaning aborted particles still in the domain but the fluent software donot computer this particle? Why the particle defined as "path abort" still have velocity?  What is the difference with path abort and path end?

Thank you again for your kindly reply.