A developing flow calls when the wall shear stress is changing due to the change in velocity profile as the boundary layer grows. So, for a pipe diameter of 1 m flowing at Re = 1000 and another again in 1 m diameter but flowing at Re = 10,000; select which of the following statement is correct:
Both laminar and turbulent flows will have equal developing lengths.
The laminar flow will have a longer developing length.
The turbulent flow will have a longer developing length.
None of the answers are correct.