In a laminar boundary layer over a flat plate, the growth of the boundary layer with distance x from leading ledge given by δ/x is proportional to Reynolds number (Rex) as
1
\({\rm{Re}}_x^{1/2}\)
2
\({\rm{Re}}_x^{ - 1/2}\)
3
\({\rm{Re}}_x^{1/5}\)
4
\({\rm{Re}}_x^{ - 1/5}\)