I am very confused with this thing can someone clarify these problems given below-- 1 //Do or can the streamlines of a fluid particle show the position of the particle at a time( using the streamlines)?? 2// I know that streamlines cannot intersect because at a specific instant the particle reaching the intersection will have two different directions of motion (in the steady flow of particles), but can I say the same thing in turbulent flow for the LINE OF FLOW of the particles // why or why not?? 3//is it necessary that a streamLINE will be a perfect straight line(to a good approximation)?? If know why is it called a line then??
- On a steady flow, streamlines correspond to the trajectory of "fluids particles" or parcels. (Not to be confused with the one of the real "particles" that are the molecules.)
- But if it's not a steady flow, it's wrong. You might even see appearant source and sink in the lines that do not exist as a flow.
- Steady flow streamlines cannot cross because of basic continuity and conservation laws: otherwise a particle should teleport itself on the other side of the obstacle that is the crossing flow ;-)
- A streamline is a curve, not especially a straight line.
- More on wikipedia.
Two particle cannot overcome each other because if it crosses then the direction of particles will be two different tangents at 1point which is not possible