Given a streamline, is it possible that the velocity at some point on it is non-zero but then at some other point(for example, stagnation point) it is zero? I mean does that make sense?
My existing knowledge tells me that a streamline is basically defined by the path traced by a fluid particle(maybe kind of a really very small drop of liquid but consisting of considerably large no. of molecules).Now a point in the streamline cannot be occupied by a single fluid particle forever. It must be replaced by a particle coming from behind. Now if the velocity at a point in the streamline is zero, but still the particle coming from behind must replace the already existing particle, then where does this particle(already existing) go?
Someone please clear my doubt? Exactly where am I doing it wrong?