The laminar boundary, layer thickness δ at any point x for a flow over a flat plate is given by
1
\(\frac{{0.664}}{{\sqrt {{R_{ex}}} }}\)
2
\(\frac{{1.328}}{{\sqrt {{R_{ex}}} }}\)
3
\(\frac{{1.75}}{{\sqrt {{R_{ex}}} }}\)
4
\(\frac{{5.0}}{{\sqrt {{R_{ex}}} }}\)