prajput
Ansys Employee

Hi @Kremella  ,

A pathline is the path or line or trajectory traced out by a single moving particle.

A line joining all these fluid particles which pass through a specific point in space is referred to as a streakline.

Streamlines are lines in the flow field such that at a given instant of time are tangential to the velocity vectors at every spatial location in a flow field. Hence, the flow cannot cross a streamline.