  The flow properties at the leading edge of a flat plate represent a
singularity to the Blasius laminar boundary layer equations; by applying the
Lagrangian approach the leading edge velocity profiles of the laminar boundary
layer over a flat plate are studied. Experimental observations as well as the
theoretical analysis show an exact Gaussian distribution curve as the original
starting profile of the laminar flow. Comparisons between the Blasius solution
and the Gaussian curve solution are carried out providing a new insight into
the physics of the laminar flow.
