BOUNDARY-LAYER GROWTH ON A FLAT CIRCULAR PLATE

A growth of the two-dimensional boundary layer over a smooth, horizont al, circular flat plate placed in a free stream with zero pressure gra dient along the surface is described and quantified in the range 6.7 x 10(4) < Re-d < 3.3 x 10(5). The boundary layer thickness, velocity pr ofile and transition region at varying transverse distances from the p late centre line are determined. It is shown that the growth of the la minar and turbulent boundary layers closely resembles that for flow ov er a flat plate with a straight leading edge, but the transitional Rey nolds number is lower than for the straight edged flat plate and it de creases as the distance from the plate centre line increases.