Question:-
A laminar boundary layer occurs over occurs over a flat plate at zero incidence of the flow. The thickness of boundary layer at a section 2m from the leading edge is 2 mm. the thickness of boundary layer at a section 4m from the leading edge will be
Option (A)
2 x (2)2mm
Option (B)
2 x (2)1/2mm
Option(C)
2 x (2)4/5mm
Option(D)
2 x (2)1/5mm
Correct Option:
(B)
Question Solution:
Thickness of Laminar boundary (d) ax1/2
\ (2/Ö2) = (d’[/Ö4)
\ d’= 2Ö2mm
question-answer-faq-2765