Which one of the following statements is correct? Hydrodynamic entrance length for
Option (A)
laminar flow is greater then that for turbulent flow
Option (B)
Turbulent flow is grater then that for laminar flow
Laminar flow is equal to that for turbulent flow. Prandtl number is know
None if these
Correct Option:
Question Solution:
The entrance length required for the flow to become fully developed turbulent flow is dependent on the surface finish, initial level of turbulence, downstream condition, fluid properties and is generally estimated to be 50-80 time the pipe diameter