I have observed a discontinuity in the Fanning friction factor chart, at around Reynold's number of 2000.
I know that this is the region where laminar flow changes to turbulent flow, but a discontinuity seems rather weird to me. I could accept a non-differentiability or a sharp turn in the graph as plausible, but a discontinuity doesnt make sense to me. It seems as if a small change in Re around 2000 could result in a large change in the friction factor, which is absurd.
Am I missing something here? Any help would be appreciated.