Hello Dr. Amine,This is how I export particle data from Fluent. EXPORT - Particle History Data - WRITE.nnAnd this one is how I import in CFD-Post. But even after I click OK, there isn't any Particle Track data under 'User Locations and Plots' tree. nnWhat I want to visualize, since currently I'm doing coughing simulation inside a room, is particle dispersion for every 5sec inside the room. n